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Are there any other reasons than mutation that could cause a virus to be able to infect the same person twice?
If you are infected by a virus, and subsequently survive it and get completely rid of the infection, are there any other possible reasons for the same virus to be able to infect you again any time in ...
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Does the blood removed from the body still have immunity?
I know that blood contains white blood cells (which attack pathogens). Suppose we take half a liter of blood out of the body and implant the virus into it. Can the white blood cells in that half a ...
