Which of the Following Statements About Vaccination Is FALSE

Which of the following statements about vaccination is FALSE?

A) An adverse reaction is an unexpected event following administration of a vaccine.
B) Periodic epidemics of whooping cough occur because of a decrease in immunisation rates.
C) All vaccines are capable of inducing mild side effects in recipients.
D) There is strong evidence that autism and the measles vaccine are linked.
E) Low immunisation rates in older children can put young babies at increased risk of infection.