Question 1
Of the following, AIDS is usually transferred by
◦ casual contact.
◦ food.
◦ water.
◦ exchange of body fluids.
◦ insect bites.
Question 2
One example of a vaccine made from weakened toxin protects against
◦ pertusis.
◦ polio.
◦ German measles.
◦ measles.
◦ tetanus.