1,000,000: More than 1 million patient specimens are tested in clinical labs participating in CDC domestic disease surveillance.* 90,000: About 90,000 specimens are tested in 93 state/local public health labs. 6,000: CDC conducts full genetic sequencing on about 6,000 flu viruses each year. 2,000: CDC tests about 2,000 flu viruses to determine their immune properties. 50: CDC prepares as many as 50 viruses for possible use in vaccine production. *2016-2017 influenza data as reported by CDC’s Influenza Division, National Center for Immunization and Respiratory Diseases (NCIRD)

Stephen B. Thacker CDC Library collection