Before a new medication is approved for sale to the public, researchers must determine its ________.

After becoming infected by the HIV virus, a person can still test negative for HIV for up to

a. two months. b. four months. c. six months. d. one year.

Although an unborn child may be protected from many different maternal illnesses, such as colds and some strains of the flu, other illnesses can be extremely harmful to the baby. Which of the following is NOT listed as one of those illnesses?

a. toxoplasmosis b. cytomegalovirus c. otitis externa d. chlamydia