Answer Happy

Question 43 (6 points) Which of these statements about vaccines is TRUE? Vaccines can be developed by altering the selective environment that a virus is adapted to and so act to mitigate their ability to evolve b) Vaccine developed using cells from monkeys or chimpanzees rarely work to prevent disease in humans c) Vaccine against flu viruses are usually ineffective because flu viruses have high mutation rates relative to many other viruses d) Vaccines rarely function to prevent disease because all viruses adapt quickly