The drug has several side ( ). A: affects B: infects C: effects D: defects

A fever usually signifiesthat there is something wrong with the body. A: creates B: infects C: denotes D: categorizes

It can be learned from the passage that______. A: it will be difficult for scientists to develop a vaccine for women B: HIV infects women in the same way with men C: most women have contracted a variety of HIV from several men D: it will be easy to develop a vaccine for men