61.   From remote villages to crowded urban railway stations, millions of children received polio vaccines Saturday in a massive effort to eradicate the crippling disease.

62.   However, some experts suspect that polio vaccine made with contaminated chimpanzee cells may have been the culprit.

63.   However, oral polio vaccine in rare instances does cause paralytic polio.

64.   However, perishable polio vaccines in cold storage survived electricity cuts.

65.   Mennonites now accept polio vaccines.

66.   Musong accused UNICEF of sitting on hundreds of thousands of dollars donated by European governments in the past year for the purchase of polio vaccines.

67.   New studies have cast more doubt on the idea that AIDS arose because an oral polio vaccine was contaminated with a precursor to the AIDS virus.

68.   Salk became a hero to millions of Americans when he ignored scientific doubters and used killed virus to develop the first polio vaccine.

69.   Results of the WHO-coordinated research were announced at a three-day meeting on new quality control tests for polio vaccines.

70.   Salk modeled his AIDS vaccine after his polio vaccine, using killed AIDS virus.