an RNA virus always can and will vary its antigen super-fast. Yet, its antigen is what our immune system relies on as the counter-attack pointer. The COVID-19 antigen has probably mutated too fast for our immune system to catch up with. In other words, we are not out of the woods and probably won't be in the near future.
an RNA virus always can and will vary its antigen super-fast. Yet, its antigen is what our immune system relies on as the counter-attack pointer. The COVID-19 antigen has probably mutated too fast for our immune system to catch up with. In other words, we are not out of the woods and probably won't be in the near future.
Year
，Merry Christmas..
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这次别错过啦：）
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