News: Pfizer data suggest third dose of Covid-19 vaccine ‘strong

Pfizer data suggest third dose of Covid-19 vaccine ‘strongly’ boosts protection against Delta variant 
https://www.cnn.com/2021/07/28/health/pfizer-third-dose-data-bn/index.html

 

A third dose of the Pfizer/BioNTech Covid-19 vaccine can “strongly” boost protection against the Delta variant – beyond the protection afforded by the standard two doses, new data released by Pfizer on Wednesday suggests.

The data posted online suggest that levels of antibodies that can target the Delta variant grow fivefold in people 18 to 55 who get a third dose of the vaccine.

Among people ages 65 to 85, the Pfizer data suggest that antibody levels that should protect against Delta grow 11-fold more than following a second dose.

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“Receiving a third dose more than six months after vaccination, when protection may be beginning to wane, was estimated to potentially boost the neutralizing antibody titers in participants in this study to up to 100 times higher post-dose three compared to pre-dose three,” Dolsten said in prepared remarks. “These preliminary data are very encouraging as Delta continues to spread.”

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But in an unusual move, the FDA and CDC said at the time Americans don’t need third doses quite yet and that it was not up to companies alone to decide when an additional dose might be needed.

US Surgeon General Dr. Vivek Murthy repeated that point Wednesday morning, telling CNN’s Poppy Harlow, “People do not need to go out and get a booster shot.”

 

所有跟帖： 

• 看樣子很快要開始打第三針了 -凡人一個- ♀ (83 bytes) () 07/28/2021 postreply 20:33:51

• 美國官方目前不支持booster。也許會隨疫情變化而改變立場 -fuz- ♂ (0 bytes) () 07/29/2021 postreply 03:22:13

• Pfizer 對delta 效果不咋地，不知啥時候打第三針。 -TheHawk- ♂ (0 bytes) () 07/28/2021 postreply 21:34:08

• 應該很快！delta去年10 月就在印度被發現，9-10 個月的研發，時間不短了。 -lawattaction- ♀ (0 bytes) () 07/29/2021 postreply 05:15:33

• 第三劑應該對Delta有效，可那時Epsilon或Zeta又出來了 -櫻紫- ♀ (112 bytes) () 07/29/2021 postreply 09:14:49