Why do doctors suggest that people get a flu vaccine each year? a. viruses replicate more rapidly over time. b. viruses can mutate from year to year. c. vaccines are absorbed by the body after a year. d. vaccines get stronger over time.

it hurts at first because " the cherry is broken" which is a thin layer of skin that breaks so the first time girls have sex it hurts and it bleeds but after the first time it does hurt again because the skin that ia torn does not break again/ grow back.