Why Do We Need One Vaccine For Measles And A Yearly One For The Flu?

Measles needs only a two-dose vaccine during childhood for lifelong immunity while the influenza virus mutates constantly and requires a yearly shot to get even a certain percentage of protection. What explains that? Surface proteins that the measles virus uses to enter cells are ineffective if they suffer any mutation, meaning that any changes to the virus come at a major cost, according to a new paper. read more

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