This report is the first analysis conducted at CDC to provide population-based estimates of the percentage of infants who were immunized against RSV in numerous U.S. states and to analyze the timing ...

West Nile virus (WNV) has been the dominant cause of mosquito-borne illness in the United States since its introduction into North America in 1999. There are no vaccines nor medications to prevent or ...

Another state has reported a possible case of human bird flu as overall figures rise in the U.S., increasing the risk of a pandemic.

MINEOLA, N.Y. (AP) — A person living in New York has tested positive for the chikungunya virus in what state health officials say is the first reported transmission of the mosquito-borne illness ...