Why do viruses more often evolve to greater transmission at the cost of virulence? From an evolutionary perspective why does this make sense?
consider an extraordinary environmental test looked by numerous microbes: suitable natural surroundings can be not many and alarmingly far between. Put yourself in the situation of an infection right at home — a human host. You've contaminated a few cells and figured out how to replicate, yet the host's invulnerable framework is onto you now and is turning up the hotness. This climate is as of now not so affable. How might you get your descendents to a more amicable territory? Without legs, wings, balances, or any of the standard method for headway, your descendents' possibilities for arriving at another host under their own force are nil. In any case, normal determination has given microbes various slippery procedures for taking the jump toward another host
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