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herd immunity 在 Facebook 的最佳解答

2021-09-14 23:48:57 有 440 人按讚

在貼文的約莫三個小時前
英國公布對於大眾 #第三劑的最新建議

也是面對病毒活躍的秋冬季，比較危險的族群如以下，被建議施打：

1️⃣. 安養院的病人
2️⃣. #所有50歲以上的成年人
3️⃣. #前線醫療衛生工作人員
4️⃣. 16至49歲且有潛在 #新冠重症風險者
5️⃣. #免疫抑制病人(器官移植、癌症治療、HIV)的成年家庭成員

比較亮眼的是抓了50歲以上的分水嶺
跟之前疫苗抗體反應研究抓的分水嶺是一樣的

這也許是我們要參考的
疫苗覆蓋大家也知道，光是一劑就是這麼不容易的事
何況到第三劑

保護好容易重症者即可，讓醫療能量不要垮
才能減少疫情再起時因為醫療支持不夠造成的額外死亡率

當然也希望第三劑續航力比第二劑更久
(在WHO網頁上輝瑞、莫德納、高端的第三劑抗體都比第二劑高)

--
這裡也談一下，WHO宣布 #群體免疫 (Herd Immunity)之日不會來
雖然這是講疫苗戰略的調整
但是對一般人意義就是全球開放之日應該不會來了?

會有今天有太多原因
像是疫苗產能不足，病毒變異，全球防疫與接種步伐不一致...

我想也許是疫情後新常態也有個譜了

也許我們這個世代口罩會拿不下來了
社交習慣也會有很大的改變 (法式擁抱消失中...)
不然就是大量依賴篩檢、疫苗護照或抗體證明來出席群聚活動
沒打疫苗或抗體不足者恐怕會社交有些困難

在疫苗覆蓋不夠的國家，如果還期望清零
就會靠高度入境篩檢與隔離檢疫

疫苗覆蓋高的國家，認為社區可以承受一定風險
就可以來考 #期末考
減少或甚至取消已經打疫苗的入境者的入境隔離天數
並且取代的是規定入境一定期間內的高頻率篩檢，例如韓國
也不是讓入境者那麼方便的

所以篩檢工具在入境普篩+社區廣篩需求下
低成本+大量生產是未來趨勢，不然會吃跨很多國家的預算

因應要減少這些高接種率帶來的壓力
(總不能每年都小巨蛋接種吧?)
會不會未來研發流感與新冠合併的ABC疫苗 (Influenza A+B & Corona virus)來一石兩鳥?

這是未來可能在別的國家看到的變化
很多國家都比我們跑在前面考期末考
這個疾病不會有根除的一天
只是看怎麼與我們在最低重症率的前提下共存了

Tags: herd immunity 第三劑所有50歲以上前線醫療衛生工作人員新冠重症風險者免疫抑制群體免疫期末考

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herd immunity 在 Facebook 的最佳解答

2021-09-10 16:57:46 有 274 人按讚

来咯来咯! 12-17岁少年打 covid 19 疫苗的守则来了 🤩🤩🤩

千盼万盼，终于等来了这个意义重大的守则了~
你给你家孩子注册打疫苗了吗?? 💉💉

其实从好几个月前开始，医院有陆陆续续地给青少年病患进行评估，准备接种疫苗。
当然，对于这个打疫苗的课题，大家也是疑惑重重，下面给大家贴上了 KKM 发布的咨询，希望可以给青少年们制造一个安全的 herd immunity, 降低他们未来在校园开学的日子里被感染的几率 👍👍

1。会接种什么疫苗?
根据 KKM 的指示，将会是接种2剂的 Comirnaty ( pfizer 出产), 时间间隔21天。

2。会在哪里接种?
目前还没收到正式的通知，但是那些有高风险疾病的青少年会在医院里接种。

3。什么是高风险疾病族群?
指的是那些免疫力比较低的患者，比如先天性疾病，需要洗肾的，需要长期用类固醇 steroid 的, 有癌症正在接受 chemo/radiotherapy 的，有在服用 anticoagulant 比如 warfarin 的 ( 通常是接受过心瓣手术的患者)，有凝血问题的小孩们。
医生会给图3的评估报告，来告知适不适合接种疫苗，有什么特别注意的事项等等。

4。有过敏的孩子可以接种疫苗吗?
根据过敏程度而定，如果是曾经发生休克状态 anaphylaxis event 的，可能就不太适合。
如果只是普通发痒红肿，没有牵涉到支气管的 ( 比如呼吸困难，嘴唇发肿)，可以请医生帮忙评估，大致上是可以接种的。

5。一定要家长签字吗?
根据国家法律，18岁以下的青少年无论是大大小小的医疗疗程都需要父母签字哦，所以接种当天，家长请记得带上自己的 IC 出席接种 😉

6。如何给自己的孩子注册?
相信大部分的孩子在 My sejahtera 里是父母的 dependent 吧? 记得到 my sejahtera apps 里更新，打开 vaccination ➡️ add vaccine dependent, 然后跟着步骤一步步注册就可以啦。

7。想给孩子打其他的疫苗可以吗?
目前为止，很遗憾的没得选 😅
在这个疫情肆虐的情况，先接种了才是安全的 💪💪

8。什么时候开始?
目前我们还在等卫生部的指示当中，但也希望家长们别等了，赶快去注册吧!

更多详情请到官网去看看哦
https://www.vaksincovid.gov.my/

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2021-09-10 09:15:08 有 77 人按讚

譚新強：中國如何防範四個封閉
文章日期：2021年9月10日

【明報專訊】近日我有兩個家人，從加拿大往上海探親，聽到他們千辛萬苦的經歷，才深深體會到中國的治疫有多麼認真。出發前，當然先需要安裝健康碼，且要拿到綠色認證，所以他們就預先去當地一間化驗所做抗體測試。因為他們已接種兩針Pfizer/BioNTech疫苗，所以驗血報告就當然顯示有抗體。但當他們去到機場辦理登機手續時，卻因為健康碼仍然紅色，而竟然被拒絕登機。他們馬上感到彷徨，不明白為何被拒，就到處問人，結果一位來自內地的年輕女生，好心解釋他們去錯了地方，做錯了測試。

原來必須去一家中國人開的化驗所，做一個特別抗體測試，能辨認出抗體來源，是來自接種疫苗，還是來自自然感染，中國的要求是抗體必須來自疫苗，健康碼才可變為綠色。我的這兩個家人，一個是專科醫生，他太太是化驗師，都可算是行內人士，但竟然他們之前從未聽過有如此精準的測試，他們也佩服中國的化驗技術，非常先進。無論如何，結果他們就去了這間中國人開的化驗所，再做測試，證明抗體來自疫苗，健康碼轉綠，就第二次登機成功，到了上海後經過兩周隔離，現在與家人團聚，非常開心。

我絕對相信只有如此嚴謹政策，才可帶來如此清潔和安全的內地環境，每十萬人的COVID感染和死亡率，都是美國和整個西方的百分之一以下，的確值得被表揚！但我有兩個疑問，這個至今非常成功的零容忍政策，可否長期延續下去？另外，如要零容忍，中國幾乎必須長期維持封關狀態，此政策將帶來什麼後果，除預期內的，會否亦帶來一些意料之外的後果？

內地嚴謹封關料維持至明年底
中國當然不承認封關，仍不停說歡迎外國朋友來中國自己親眼看看情况，數天前更擴大前海面積7倍，繼續鼓勵香港融入大灣區云云，但事實仍是中國封關已近兩年，當然不會永遠，但如再封一年，已是一段很長時間，全球局勢已可出現風起雲湧變化。

從我家人親身經驗，除發現中國醫學化驗科技，一日千里外，另一更重要啟示是原來現在中國，是不容許和不歡迎任何曾經感染過COVID的人進入，其實這是一個頗為驚人和極端的政策！須知道，除抗體測試外，登機前、入境前後，當然亦要求每名旅客做多次核酸測試，確認即時沒有帶菌，所以抗體測試的重點並非找出帶菌者，而是真的拒絕任何曾經感染過COVID的人入境，包括已復原的人！

官方統計，全球測試出感染者數目已超過2.2億人，估計真實數字可能超出10億人，即是說，中國可能拒絕多達全球七分之一人口進入！再想一下，既然中國這麽用心設計出一套這麼精密的測試，加上健康碼和一系列隔離，以及索源追踪系統，更令我更相信這些嚴謹、接近封關的政策，必將維持一段頗長時間。再加上明年冬奧，和中國的政治時間表，不少人已意會到中國的嚴謹封關，大概率最快都將維持至明年底或2023年初。

有些人說，中國不會長期封關，只需全國約七成至八成人接種兩針後，即可馬上全面通關。我也希望是這樣，但我認為機會不大。首先現在全球最流行的Delta variant，傳染度比之前的高很多，R0可能高達8至9，所以Herd Immunity（群體免疫）的臨界點可能高達90%，再加上COVID的變異速度也超高，大大影響疫苗的有效度，亦需不停調校成分，所以整個Herd Immunity概念已沒甚意思。加上中國至今以傳統滅活技術疫苗有它的好處，較安全和較清楚長期副作用，但無法否認全新mRNA技術的疫苗，有效率確高於傳統滅活。所以如果開關，即使接近全民接種疫苗，還是極大可能將見到感染個案大幅上升。當然如打了兩針或更好的三針，死亡率必將大跌，但至今中國的零容忍政策不止是零死亡，是更強勢的零感染！

零容忍政策不止零死亡更要零感染
當然其實大家最渴望的是全球疫情早日過去，所有人生活回復「正常」。我也希望如此，但我一早已預計COVID將由pandemic（大流行）演變為更麻煩的endemic（風土病），且某程度上，人類歷史將可分為B.C.（Before Coronavirus）和 A.C.（After Coronavirus），不幸似乎已應驗了。Endemic的意思是COVID將揮之不去，永久流傳，且不斷變異，確跟flu（流感）有點類似，但即使經過多次變異，疫苗發展和療法的進步，CFR（Case Fatality Rate）仍徘徊在1.5%，仍是流感的10倍以上，絕不可完全不管。

數天前跟一位外國的頂級策略師通話，他指出全球只剩下中國內地、香港（可能加台灣？）和新西蘭，仍堅持零容忍政策，連日本、新加坡和澳洲等地，都已不幸失守，或逐漸放棄嚴控疫情政策。他悲觀地認為Delta浪是無法抵擋的，北半球夏季已如此厲害，到了進入秋冬將更嚴重，擔心連中國也將失守。他更認為接種疫苗也只不過是權宜之計，真正感染過COVID後的抗體才最有效，但我認為此說法並不科學，看到研究報告，打完任何技術的booster第三針後，抗體量都比兩針或感染COVID後的高很多。

港人未能無隔離進內地令人費解
習慣了香港的安全環境，當然希望他的預測是錯的。但秋冬確可能是高峰期，所以連香港的嚴謹旅遊政策，亦必將繼續。早前歐洲商會警告如香港繼續封關，他們很多會員將無法忍受，更將傷害香港營商環境和國際中心地位。但港府已作出回應，現在香港和內地的治疫成功，得來不易，但至今香港仍未能與內地通關。如香港疫情失守，更將無望與內地通關。其實香港早已本地清零，近日逐漸開放單向來港通關，是好事，但仍未能讓港人自由無隔離進入內地，實在令人費解。固然可能跟香港未行使健康碼有關，但相信亦有其他因素，包括冬奧前不願冒任何風險，擔心部分香港人更可怕的思想病毒，和一改從前過於遷就香港人的呵護政策。

更重要的問題是，長期封關對中國內政以及外交關係有何影響？我觀察是要慎防四個封閉：

1. 封關後，似乎中國就認為這就是做「大掃除」的最好時機。近月中國明顯加速各方面改革步伐，包括教育、地產、醫療、互聯網、資本市場、文化、外交、軍事，和更核心的意識形態。中國過去40年，最成功有兩點，就是和平崛起和拋開意識形態，以實務發展為先。我仍希望中國能保持和平崛起，但當然在台灣、南海以至阿富汗等面對各種挑戰。我早已指出中國未來發展將需要一套較完整但仍務實的經濟甚至政治理論基礎。拉倒大家都知道大有問題的西方發展模式容易，尤其美國企圖以QE解決所有問題，導致社會分裂，但如何發展一套全新模式需要很長時間。中國各政策，分開個別來看，都有一定道理，亦大受內部歡迎，但加起來，就有點快速豪賭一舖的感覺。中國是一個大國，行事應否較慎重和穩定，值得討論和反思，亦當然需要考慮對外交，軍事，和世界和平的影響。即使各政策對治疫、氣候變化、貧富懸殊等問題有幫助，但無意中反加深外國人對中國的誤解和偏見（不止投資者），從而增加了戰爭的風險，這就要非常小心了。

加快改革如豪賭反加深外國人對中國偏見
2. 數據年代中，既然中國封了旅遊的關，其實更需要開闊互聯網和傳媒等的資訊流通關，但不幸在最關鍵的過去一年多，雖說要講好中國的故事，但事實絕不見得在這方面有任何努力過。如中國與美國為首的西方繼續加深，像近日索羅斯這老人家竟公開批評Blackrock增加在華投資，警告將危害美國和西方的國家利益，其實情况已有點危險。

3. Blackrock確拿到中國第一張全資公募基金牌照，但其實中國金融市場和資本帳仍然非常封閉，尤其仍嚴控資金外流，形成人民幣地位與中國經濟規模極不匹配的危險情况。中國PPP GDP已是第一，佔全球的23%，但名義GDP仍是第二，佔全球只16%，且今年中國貿易順差急速擴大。從西方角度看，這就是故意操控貨幣，壓低人民幣匯率，採取不公平貿易政策，其實情况有點似清代早期，中國出售大量茶葉、瓷器和絲綢給英國，但拒絕購買英國貨，形成龐大以白銀為本位的貿易順差，英國才想出以鴉片來毒害中國人民的邪惡計劃，以此扭轉貿易平衡，最後導致戰爭。今天中國已非吳下阿蒙，不會受列強欺壓，但當然仍該避免戰爭！

4. 最後，中國人勤奮好學，素質愈來愈好，平均中國年輕人，對世界的認知，毫無疑問，肯定比平均的美國人，甚至大部分西方人都要好。但如封關太久，加上資訊開放亦不足夠，資本帳更不流通，實在有需要提醒國人，切記千萬不可連重中之重的思想，都逐漸封閉起來！

（中環資產擁有Pfizer財務權益）
中環資產投資行政總裁
[譚新強中環新譚]

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herd immunity 在賓狗單字Bingo Bilingual Youtube 的最讚貼文

By 賓狗單字Bingo Bilingual

2020-10-14 21:00:13 有 360 人看過有 13 人喜歡

賓狗的更多英文學習資源：https://www.zeczec.com/projects/bingobilingual
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1 【immune 免疫的】-- 形容詞
Most adults are immune to chickenpox.
（水痘）

be immune to

immune system; immune response

免疫的；不受影響的；豁免的

2【immune 不受影響的】-- 形容詞
She has become immune to criticism.

be immune to

3 【immune 豁免的】-- 形容詞
No one should be immune from punishment.

immune from

4 【immunity 免疫】-- 名詞
免疫；不受影響；豁免

The vaccine provides immunity to flu.

herd immunity 群體免疫
(小心 herd 發音)

diplomatic immunity 外交豁免權

5 【immunization 使變成免疫】-- 名詞
The immunization program helps prevent epidemics through vaccination.

簡單複習
1 immune 免疫的，介系詞用 to
2 immune 不受影響的，介系詞也用 to
3 immune 豁免的，介系詞用 from
4 immunity 免疫；不受影響；豁免
5 immunization 使變成免疫（名詞）

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2020-04-05 08:00:00 有 204,909 人看過有 6,604 人喜歡

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謎米：思想及行為的傳遞《謎米香港》是一個綜合性網上平台；透過時事、娛樂及生活等不同領域的節目，承傳令人類進步的價值觀。

herd immunity 在 POPA Channel Youtube 的精選貼文

By POPA Channel

2017-07-12 08:30:00 有 8,922 人看過有 203 人喜歡

BB出生，經過痛苦的生產過程，然後投入媽媽懷中，這個畫面是否很溫馨？但殘酷的現實是，媽媽只抱了一會，就被姑娘帶去「拮屁股」，打防疫針，爸爸媽媽看著也心痛。有人說打了針才可幫孩子抵抗病源，但亦有人指疫苗很多副作用，究竟誰對誰錯？雙方都是想小朋友健康成長，但為何會出現兩極意見？

要討論打與不打，其實我們又是否清楚：疫苗，到底是什麼？

參考資料

Bellini, W., Rota, J., Lowe, L., Katz, R., Dyken, P., Zaki, S., . . . Rota, P. (2005). Subacute Sclerosing Panencephalitis: More Cases of This Fatal Disease Are Prevented by Measles Immunization than Was Previously Recognized. The Journal of Infectious Diseases, 192(10), 1686-1693. doi:10.1086/497169

Eggertson, L. (2010). Lancet retracts 12-year-old article linking autism to MMR vaccines. Canadian Medical Association Journal, 182(4). doi:10.1503/cmaj.109-3179

Epidemiology and Prevention of Vaccine-Preventable Diseases. (2016, December 30). Retrieved from Centers for Disease Control and Prevention

Measles (Rubeola). (2017, March 03). Retrieved from Centers for Disease Control and Prevention
Orenstein, W. A., & Ahmed, R. (2017). Simply put: Vaccination saves lives. Proceedings of the National Academy of Sciences, 114(16), 4031-4033. doi:10.1073/pnas.1704507114

立法會五題：疫苗含硫柳汞的安全性【新聞公報】，政府新聞網（2016年4月20日）
接種疫苗預防傳染病（2014年），香港特別行政區政府衞生署網站。

Phadke VK, Bednarczyk RA, Salmon DA, Omer SB. Association Between Vaccine Refusal and Vaccine-Preventable Diseases in the United StatesA Review of Measles and Pertussis. JAMA. 2016;315(11):1149–1158. doi:10.1001/jama.2016.1353

Reading, R. (2002). First 5 years of measles elimination in southern Africa: 1996-2000. Child: Care, Health and Development, 28(5), 433-434. doi:10.1046/j.1365-2214.2002.t01-4-00293.x

Recommendations of the Advisory Committee on Immunization Practices (ACIP): Use of Vaccines and Immune Globulins in Persons with Altered Immunocompetence. (n.d.). Retrieved from Centers for Disease Control and Prevention

Vaccines & Immunizations. (2017, May 08). Retrieved from Centers for Disease Control and Prevention

Kayue（2016年3月18日）。美國研究︰麻疹疫症感染者未接種疫苗佔多數。The News Lens關鍵評論。

POPA Channel

About author

幾個家長走埋一齊，將從閱讀所得的知識整合，化繁為簡，與大家分享正面育兒(POSITIVE PARENTING)的資訊。 ===================================== 幾年前，初為父母，第一次抱住自己的孩子，發覺養育、教育孩子，是一門高深學問。時代不同，父母對我們的一套，應用在自己孩子身上，亦未必適合。因而開始閱讀育兒書籍、兒童心理學等文獻，發現學術界近年對兒童成長發展的深入了解，其實對家長們極為實用。但現今父母日日為口奔馳、回家要湊BB都已經筋疲力竭，哪有餘暇、精力去搜尋、閱讀又長又悶的學術文章？於是，我們幾個家長，以正面態度去養育孩子為前題，將自己從閱讀所得的知識，透過輕鬆易明的手法，與各位關心孩子成長發展的父母，分享實用資訊。 POPA Channel 亦因而誕生！ ===================================== Official Homepage: http://popa.hk Facebook Page: www.facebook.com/popachannel

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herd immunity 在 Five reasons why COVID herd immunity is probably impossible 的相關結果

The key to herd immunity is that, even if a person becomes infected, there are too few susceptible hosts around to maintain transmission ... ... <看更多>

herd immunity 在 Rethinking Herd Immunity and the Covid-19 Response End ... 的相關結果

When most of a population is immune to an infectious disease, this provides indirect protection—also called population immunity, herd immunity, ... ... <看更多>

herd immunity 在 Herd immunity - Wikipedia 的相關結果

The term "herd immunity" was first used in 1894 by American veterinary scientist and then Chief of the Bureau of Animal Industry of the US Department of ... ... <看更多>

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The key to herd immunity is that, even if a person becomes infected, there are too few susceptible hosts around to maintain transmission ...

#2. Rethinking Herd Immunity and the Covid-19 Response End ...

When most of a population is immune to an infectious disease, this provides indirect protection—also called population immunity, herd immunity, ...

#3. Herd immunity - Wikipedia

The term "herd immunity" was first used in 1894 by American veterinary scientist and then Chief of the Bureau of Animal Industry of the US Department of ...

#4. Herd immunity - APIC

Herd immunity (or community immunity) occurs when a high percentage of the community is immune to a disease (through vaccination and/or prior illness), ...

#5. Herd Immunity | History of Vaccines - HistoryOfVaccines.org

Herd Immunity. See how high vaccination rates protect the ... Learn about the human immune system's response to vaccination. Then sequence the steps in the ...

#6. Herd Immunity - WebMD

Herd immunity, or community immunity, is when a large part of the population of an area is immune to a specific disease.

#7. Herd Immunity: What It Means for COVID-19 - Healthline

Herd immunity is community or group protection that happens when a critical number of the population is immune to a certain disease. It can help stop or slow ...

#8. Has Spain reached herd immunity? - The Lancet

Has Spain reached herd immunity? ... Spain was one of the countries hit earliest and hardest by the COVID-19 pandemic, introducing a hard lockdown ...

#9. COVID-19 Vaccine Key to Reaching 'Herd Immunity' - MU ...

Herd immunity, or community immunity, happens when a sufficient proportion of a population (the percentage varies by disease) is immune to an infectious disease ...

#10. COVID-19: Science in 5: Episode #1 - Herd immunity - WHO ...

WHO's Chief Scientist, Dr Soumya Swaminathan explains herd immunity.

#11. Covid-19: How Much Herd Immunity is Enough? - The New ...

Consequently, those scenarios call for higher herd immunity; for example, at an R0 of 5, more than four out of five people, or 80 percent, must ...

#12. Herd immunity and herd effect: new insights and definitions

It is defined as: "the reduction of infection or disease in the unimmunised segment as a result of immunising a proportion of the population". Herd immunity can ...

#13. CDC shifts pandemic goals away from reaching herd immunity

Since the earliest days of the pandemic, there has been one collective goal for bringing it to an end: achieving herd immunity.

#14. Vaccine Glossary of Terms | CDC

Active immunity: The production of antibodies against a specific disease by the immune system. Active immunity can be ... Also known as herd immunity.

#15. Herd Immunity: How Many People Need to Get the COVID-19 ...

"Herd immunity is when a large enough portion of a community is immune to a virus so that the virus can no longer spread easily from person to ...

#16. What Is Herd Immunity? | Infectious Diseases - JAMA Network

Herd immunity occurs when a significant portion of a population becomes immune to an infectious disease and the risk of spread from person ...

#17. What doctors wish patients knew about COVID-19 herd immunity

Herd immunity occurs when a significant portion of a population becomes immune to an infectious disease, limiting further disease spread. For ...

#18. Herd Immunity (COVID-19) | SCDHEC

Herd immunity happens when enough people are protected from a disease because they've been vaccinated or had the disease. Herd immunity makes it hard for ...

#19. What is herd immunity? A public health expert and a medical ...

The term herd immunity means that enough of a population has gained immunity to stifle a pathogen's spread. You can think of herd immunity ...

#20. herd immunity | immunology | Britannica

herd immunity, also called community immunity, state in which a large proportion of a population is able to repel an infectious disease, thereby limiting ...

#21. What is Herd Immunity and How Can We Achieve It With ...

When most of a population is immune to an infectious disease, this provides indirect protection—or population immunity (also called herd immunity or herd ...

#22. Herd Immunity: Will We Ever Get There? - Yale Medicine

Put simply, herd immunity means a large portion of a community is immune to a disease, making further disease spread unlikely.

#23. What Is Herd Immunity? (for Parents) - Nemours KidsHealth

Herd immunity is the idea that when many people are immune to a contagious infection, usually by getting a vaccine, it's harder for that infection to spread in ...

#24. Vaccines Protect Your Community | HHS.gov

n\nThis concept is called community immunity, or herd immunity. And it's an important reason for you and your family to get vaccinated — so ...

#25. What Is Herd Immunity and How Does It Work? | Pfizer

Herd immunity occurs when the majority of a population is immune to a disease or virus.Otherwise known as community immunity 1, it helps to slow the spread ...

#26. Is herd immunity still possible? CDC messaging suggests not

The idea is that when a large portion of the population becomes immune to a disease, it becomes harder to spread. The goal seems simple, but ...

#27. Rethinking Herd Immunity: Managing the Covid-19 Pandemic ...

Herd immunity is dynamic and depends on the transmissibility of each new Covid-19 strain, the effectiveness of previous immunity due to previous ...

#28. How Herd Immunity Works — And What Stands In Its Way - NPR

When enough people are immune — through vaccination or natural immunity — a population achieves herd immunity. The disease stops spreading ...

#29. COVID vaccine: Who in Europe is leading the race to herd ...

... that a fresh wave of COVID-19 infections is sweeping parts of Europe, here's a look at the countries closest to achieving herd immunity.

#30. Herd immunity is 'mythical' with the Covid delta variant ... - CNBC

Achieving herd immunity with Covid vaccines when the highly infectious delta variant is spreading is likely to be impossible, ...

#31. Primer Herd Immunity: Understanding COVID-19 - Science ...

In a sufficiently immune population, herd immunity provides indirect protection to susceptible individuals by minimizing the probability of an ...

#32. Herd Immunity: What, Why, and How? | Rotary International

Herd Immunity : What, Why, and How? When most of a population is immune to an infectious disease this provides protection to those who are not immune to the ...

#33. “Herd Immunity”: A Rough Guide | Clinical Infectious Diseases

The term “herd immunity” is widely used but carries a variety of meanings [1–7]. Some authors use it to describe the proportion immune among ...

#34. How far is Taiwan from herd immunity? - CommonWealth ...

How far is Taiwan from herd immunity? Source：Chien-Tong Wang. The US has sent 2.5 million doses of the Moderna COVID-19 vaccine, but Taiwan has ...

#35. Herd immunity Definition & Meaning - Merriam-Webster

The meaning of herd immunity is a reduction in the risk of infection with a specific communicable disease (such as measles or influenza) that occurs when a ...

#36. Path to Normality - COVID-19 Vaccine Projections

Herd immunity is not permanent. It can be lost due to waning immunity, both from infection and vaccination. For the purpose of estimating new infections, we do ...

#37. Covid report: What is herd immunity? - BBC News

Herd immunity is a scientific term describing the point at which a population is protected from a disease, either by enough people being ...

#38. Core Concept: Herd immunity is an important—and ... - PNAS

Since the earliest months of the COVID-19 pandemic, “herd immunity” has become shorthand for the day when enough people are immune to the virus ...

#39. Family Herd Immunity: Study Shows Dramatic Protection

But the truth is more complicated than that. In reality, herd immunity is really a local phenomenon. If the level of immunity in your local ...

#40. Opinion | Herd immunity is approaching. What that means now.

Herd immunity means that so many individuals have achieved protection that their collective immunity prevents the virus from circulating in that ...

#41. Does Herd Immunity Still Matter? - Verywell Health

In the early days of the vaccine rollout, health authorities supported achieving “herd immunity,” or community immunity, a situation where a ...

#42. Herd immunity Definition & Meaning | Dictionary.com

Herd immunity definition, the immunity or resistance to a particular infection that occurs in a group of people or animals when a very high percentage of ...

#43. Has Delta killed the herd immunity dream? - France 24

Herd immunity is achieved when a certain threshold of the global population has either been inoculated against a pathogen or has recovered from ...

#44. COVID-19 herd immunity: 7 questions, answered - MD ...

Herd immunity happens when enough people have developed immunity to a particular infectious disease that the risk of further community ...

#45. We might never reach herd immunity with Covid-19. But here's ...

(CNN) If you think herd immunity is the finish line to this pandemic, it's time for a reality check. Herd immunity with Covid-19 could come ...

#46. COVID-19 Coronavirus vaccine | South African Government

Herd immunity. When a lot of people in a community are vaccinated, the pathogen has a hard time circulating because most of the people it encounters are immune.

#47. Why 'ideal' herd immunity for COVID-19 is likely impossible

McMaster University professor David Earn, an applied mathematician specializing in epidemiology, said herd immunity has traditionally just meant ...

#48. Is herd immunity closer than we think? | AAMC

Herd immunity occurs when a significant portion of a population achieves immunity to a disease, either through prior infection or vaccination, ...

#49. The World May Never Reach Herd Immunity Against Covid-19

As Covid-19 surged last year, governments worldwide touted the hope of “herd immunity,” a promised land where the virus stopped spreading ...

#50. Answering Common Questions About Herd Immunity and ...

Also referred to as “community immunity,” herd immunity is a public health termExternal link:open_in_new used to describe a case in which the ...

#51. Covid-19: Delta infections threaten herd immunity vaccine ...

Herd immunity is not relevant as we are seeing plenty of evidence of repeat and breakthrough infections.” Andrew Noymer, an epidemiologist at ...

#52. With pediatric COVID vaccines a reality, experts reexamine ...

Hermos is not optimistic that a whole state will get to herd immunity against the coronavirus without significantly higher vaccination rates ...

#53. What is Herd Immunity? - News Medical

Herd immunity occurs when the majority of a population develops immunity against a contagious disease either through vaccination or due to a ...

#54. Herd Immunity: How does it work? — Oxford Vaccine Group

Manish Sadarangani: Herd immunity describes how a population is protected from a disease after vaccination by stopping the germ responsible for ...

#55. Has Delta Killed the Herd Immunity Dream?

Herd immunity is achieved when a certain threshold of the global population has either been inoculated against a pathogen or has recovered from ...

#56. Delta variant renders herd immunity from Covid 'mythical'

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#57. Herd immunity: Deadly or defensive - LWW

SARS-CoV-2 is an infectious virus. Herd immunity will need a large majority of the population to be infected so that they become immune to the disease and stop ...

#58. COVID: Why experts say herd immunity is still out of reach - DW

The goal posts for COVID herd immunity keep shifting. What should we be aiming for? Despite vaccinations, coronavirus cases continue to rise ...

#59. COVID Herd Immunity: A Family Affair? | MedPage Today

Swedish study suggests 'immune' relatives are a family's best defense ... which likely has implications for herd immunity and pandemic ...

#60. Herd immunity likely to be 'made harder' by variants - RACGP

Graphic representing herd immunity New COVID strains like the Delta variant of concern will make it more difficult for Australia to reach ...

#61. What is herd immunity? | Gavi, the Vaccine Alliance

Herd immunity is the indirect protection from a contagious infectious disease that happens when a population is immune either through ...

#62. UF Health researcher explains herd immunity and how it could ...

It's a term we're going to hear much more frequently during the final chapter of the COVID-19 pandemic — herd immunity. With millions of ...

#63. Is herd immunity to COVID-19 possible? Experts ... - USA Today

The United States may never reach full herd immunity against COVID-19 experts say, but vaccination can tame the coronavirus.

#64. COVID-19- What We Know So Far About…Herd Immunity

Herd immunity refers to a state where a significant proportion of the population is immune to an infection leaving few susceptible people ...

#65. What If We Never Reach Herd Immunity? - The Atlantic

If vaccine efficacy against transmission falls below the herd-immunity threshold, then we would need to vaccinate more than 100 percent of the ...

#66. Dr. Kevin Tracey: Covid vaccines won't provide herd immunity ...

The best estimates for herd immunity — the proportion of a population that needs to be immune from the virus so that the number of new ...

#67. Coronavirus herd immunity: What it means and when will we ...

Herd immunity occurs when the vast majority of people in a geographic region are immune to a disease, eventually stopping its spread.

#68. With herd immunity elusive, vaccination best defense against ...

Epidemiology expert Julie Parsonnet warns that COVID-19 vaccine hesitancy has probably made herd immunity unattainable, ...

#69. Hospitals Can Achieve Herd Immunity Even If the U.S. Can't

One question that doesn't seem to come up in discussions about how best to reach herd immunity against COVID-19 is this: How big is the herd ...

#70. Understanding the journey to herd immunity | PATH

Herd immunity refers to the protection from an infectious disease that occurs when a sufficient proportion of a population can no longer acquire ...

#71. Will the spread of the Delta variant prevent herd immunity?

Scientists hoped that, following vaccination, populations would develop herd immunity to SARS-CoV-2, reducing the risk of infection, even for ...

#72. Brazos County Health Authority discusses herd immunity ...

Brazos County Health Authority discusses herd immunity, holiday plans and risk for COVID-19 surges. " I would encourage folks to use all ...

#73. Herd immunity: What it is and Why it's Important | Allina Health

Herd immunity can protect a population from a specific disease, even if a small part of a population isn't immune—for example, children and ...

#74. Toward Achieving a Vaccine-Derived Herd Immunity ...

Herd immunity is a measure of the minimum percentage of the number of individuals in a community that is susceptible to a disease that need to ...

#75. U.S. could reach herd immunity by late spring - News | UAB

Suzanne Judd, Ph.D., an epidemiologist at UAB, explains what will lead to herd immunity and why it is important to remain vigilant in ...

#76. Herd immunity "out of reach" due to Delta variant - NL Times

Herd immunity against Covid-19 is no longer a realistic goal, Health Minister Hugo de Jonge said in a parliamentary debate on Tuesday.

#77. CDC takes stock, backs away from COVID-19 'herd immunity ...

Since the earliest days of the pandemic, there has been one collective goal for bringing it to an end: achieving herd immunity.

#78. Herd immunity - The Irish Times

... in fact, one of herd immunity, constrained only by the ability of the health sector to cope with the casualties of this policy ...

#79. Medical Expert: Herd Immunity Remains Best Way To Get ...

“If you define herd immunity as a critical decrease in this virus' ... is it causes you to make an immune response to the lining of your own ...

#80. Covid-19 Herd Immunity Looks Like A Mirage, But Is Worth ...

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#81. Here's how herd immunity works | OSF HealthCare

“When we have herd immunity, it means a good portion of the population is immune to a disease,” Lori said. “If I am immune as an individual, I ...

#82. Herd Immunity and Vaccine Equity - Public Health Madison ...

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Herd immunity is often seen as the end game of the COVID-19 pandemic. This threshold is reached when the virus cannot easily spread because ...

#84. What Is Herd Immunity? | INTEGRIS Health

Herd immunity occurs when a large number of people in a community, city, state or country become immune to a disease.

#85. Can herd immunity stop COVID-19? | News

Whether or not COVID-19 can be conquered through herd immunity is an open question, according to experts.

#86. We probably won't reach herd immunity against COVID-19 ...

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#87. CDC shifts goals away from reaching COVID herd immunity

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Governments and officials are voicing hopes that COVID-19 vaccines could bring "herd immunity", with some calculating that immunising just ...

#92. What Is 'Herd Immunity,' Can It Stop COVID-19? | Health.com

Herd immunity (aka community immunity) occurs when enough people in a population are immune to a disease, making person-to-person transmission ...

#93. Herd Immunity for COVID-19 - GAO

Reaching this “herd immunity threshold” limits the likelihood that a non-immune person will be infected. In general, immunity develops through either infection ...

#94. How Close Are We to Herd Immunity for COVID-19? Doctors ...

A community gains herd immunity when a significant portion of the population (the “herd”) becomes immune to an infectious disease, according to ...

#95. The Relationship Between Vaccines and Herd Immunity

Herd immunity describes a situation in which a large part of a population is immune to a particular disease due to vaccination or previously ...

#96. Green Bay doctor says vaccinated kids could help reach ...

... we have stronger herd immunity. Right now, our hospitals are maxed out. I hear a lot of people say that natural immunity is better.

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