41.   In countries that regularly vaccinate children, it has all but disappeared.

42.   In the past, few mothers were aware of the need to vaccinate children against polio.

43.   Money also will go to vaccinating Afghan children against measles and polio.

44.   Once the world has been declared free of polio, experts must then decide how and when to stop vaccinating children.

45.   President Boris Yeltsin appealed to the Russian people earlier in the week to vaccinate their children against polio, which causes paralysis and muscle atrophy.

46.   Relief workers have begun vaccinating children in the camp, primarily against measles, Ms. Foa said.

47.   Previous efforts to vaccinate children were often disrupted by fighting.

48.   Some are not getting their children vaccinated at all, and this is blamed for new cases of measles reported this week.

49.   The disease is spread by human feces, and all children must be vaccinated within days of an outbreak to prevent spread of the infection.

50.   The group has been vaccinating children in the camp to guard against outbreaks of polio, tuberculosis and other diseases.