41.   The vaccine distributed this year protects against both strains of influenza virus, Fukuda said.

42.   The vaccine is derived from killed influenza viruses.

43.   Then they infected the animals, in one experiment, with coxsackie viruses and, in a second experiment, with influenza viruses.

44.   The vaccine protects only against respiratory illnesses caused by influenza viruses, she cautioned.

45.   The yeast molecule has no effect on other types of viruses, including the HIV virus that causes AIDS and the influenza virus.

46.   There his scientific interests moved gradually from influenza virus to the urgent effort to develop a polio vaccine.

47.   Three years ago, Wiley reported the first discovery of a virus harpoon, in a protein of the influenza virus.

48.   To help diagnose influenza, physicians should be encouraged to perform a rapid test that detects an antigen, or protein, in the influenza virus.

49.   Three weeks later, the participants provided a second blood sample that was compared to the first sample to measure the immune response to the influenza viruses.

50.   After breeding mice without this gene, the researchers infected them and a group of normal mice to the influenza virus and the Coxsackie virus.