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new COVID-19 strains

New COVID-19 strains – what does it mean for vaccines

We have been hearing about several new strains of the SARS-CoV-2 virus that causes COVID-19. There may be hundreds or even thousands of variants of the virus, although most may confer no evolutionary advantage and just die out.

Of course, there are only a handful of new COVID-19 strains that are actually dangerous, but the issues are whether the new vaccines from Pfizer, Moderna, JNJ, and AstraZeneca confer immunity to these new strains and what regulatory requires may be necessary for the vaccine manufacturers to respond to them.

Let’s take a quick review of these new COVID-19 virus strains and what we know about vaccine effectiveness against them.

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