After taking a particular drug, Hal began feeling that time was passing very slowly, and he began having profound thoughts about the nature of time and the universe. While this first experience was at first deeply moving, leading to feelings of elation, the next time Hal tried this drug, he felt anxious and depressed. What drug did Hal probably take?a) marijuanab) ecstasyc) heroind) cocaine

If scientists are trying to use what they know about hsv to devise a means of protecting other people from being infected, which of the following would have the best chance of lowering the number of new cases of infection? a) vaccinate of all persons with preexisting cases of hsvb) interfere with new viral replication in preexisting cases of hsvc) treat hsv lesions to shorten the breakoutd) educate people about avoiding sources of infection