There8217;s new optimism surrounding Pfizer8217;s coronavirus vaccine8217;s ability to fight against the rapidly spreading new variants. CNBC8217;s Meg Tirrell reports. For access to live and exclusive video from CNBC subscribe to CNBC PRO: https://cnb.cx/2NGeIvi
New more contagious variants of the coronavirus are being investigated in the United States, raising questions about whether the Covid vaccines currently in use will provide protection against mutations.
So far, studies suggest that the vaccines currently in use can recognize the emerging variants — but they don’t provide as much protection against these new strains. The variant from South Africa, for example, reduced Pfizer-BioNTech’s antibody protection by two-thirds, according to a February study. Moderna’s neutralizing antibodies dropped six-fold with the South Africa variant.
(There are several reasons the antibodies generated after receiving a vaccine might recognize a variant but not fight it as well. For instance, antibodies protect you by attaching to each individual spike protein on the surface of the coronavirus, which prevents it from infecting your cell. If a variant produces many times more virus, the antibodies may not be able to attach to all those virus pieces as precisely or efficiently.)
The three vaccines that have been authorized by the Food and Drug Administration for emergency use from Moderna, Pfizer-BioNTech and Johnson & Johnson work in different ways, and therefore have different approaches to handling variants.
The News with Shepard Smith is CNBC’s daily news podcast providing deep, non-partisan coverage and perspective on the day’s most important stories. Available to listen by 8:30pm ET / 5:30pm PT daily beginning September 30: https://www.cnbc.com/2020/09/29/the-news-with-shepard-smith-podcast.html?__source=youtube%7Cshepsmith%7Cpodcast
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