51.  Last February, scientists reported that many infected people had developed osteoporosis as a complication of anti-HIV therapy.

52.  More states are also strengthening programs to notify partners of infected people.

53.  Most hospitals refuse to accept infected people, saying they lack the knowledge or the protective procedures.

54.  Most infected people have no symptoms and do not know they are infected for years.

55.  New drugs that fight HIV and AIDS are allowing more infected people to return to work.

56.  New data reported here suggest that the ability of the AIDS virus to mutate and recombine in infected people raises serious questions about whether a vaccine can be developed.

57.  Newer drug combinations, including protease inhibitors, have greatly improved the health of many infected people.

58.  No one here is questioning that many infected people have benefited greatly from the combinations of newer and older anti-HIV drugs.

59.  Nevertheless, not enough time has passed to determine how many infected people the combination therapies will benefit.

60.  Of course, if several infected people entered different parts of the city at the same time, the number of victims could be far greater.