Influenza A--Florida and Tennessee, July-August 1998, and virologic surveillance of influenza, May-August 1998.

During July and August 1998, the state departments of health in Florida and Tennessee each reported an outbreak of influenza. The Florida outbreak occurred in July in two residential homes for children; the Tennessee outbreak occurred in August among members of a family that vacationed together. This report summarizes the investigation of these outbreaks, which were caused by influenza type A(H3N2) viruses, and presents information on influenza isolates received by CDC during May-August 1998, 81% of which were influenza A(H3N2).