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Originally Posted by OrangeBlossomBaby
...and this herd immunity is only for this incarnation of the virus. If the virus mutates, the vaccine might - or might not - protect anyone against the new mutation of it. We really won't know for sure until next year, whether or not it will mutate and require a new vaccine to protect against the mutation.
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The vaccines are a fascinating, deep, and broad story with more questions than black and white answers. I find Pulitzer Prize winner Lori Garrett to be my "go-to" individual as a source of knowledge. She correctly predicted this Plague several years ago in her book. One question that comes up is the difficultly of delivery for the Pfizer and Moderna vaccines due to expensive refrigeration requirements. The JnJ vaccine is on schedule to be available sometime in January. It (I believe) has larger phase 3 volunteer numbers than the Pfizer vaccine - and other advantages. Garrett stated that Pfizer may be having trouble supplying the number of doses that they originally claimed - Moderna also because they are both based on the same system - requiring extreme cold storage - and needing the same raw materials in manufacturing. The JnJ vaccine uses a different approach so has several advantages. So, like I said - more questions than answers, which is to be expected with a completely new "novel" virus.