Eli5 What is viral fitness and viral bottleneck?
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5 YO answer. Viral fitness answers the question “how well does a virus grow and reproduce when it infects a person, or animal, or in a laboratory setting?” Viral bottleneck refers to how many viral particles one infected person has to transmit to another one to get them infected. For some viruses, or species of a single virus, its a lot; for others, not many.
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