Packing and Shipping of Influenza Specimens; Influenza (Flu) Viruses (CDC) Influenza A (H7N9) Virus Information (CDC) Influenza A (H3N2) Variant Virus (CDC) Fact Sheet: Key Facts about Human Infections with Variant Viruses (CDC) Prevention Strategies for Seasonal Influenza in Healthcare Settings Packing and Shipping of Influenza Specimens; Influenza (Flu) Viruses (CDC) Influenza A (H7N9) Virus Information (CDC) Influenza A (H3N2) Variant Virus (CDC) Fact Sheet: Key Facts about Human Infections with Variant Viruses (CDC) Prevention Strategies for Seasonal Influenza in Healthcare Settings Influenza (Flu) Fact Sheet Some type A flu viruses can cause illness in pigs. These viruses are called “swine flu viruses.” Although swine flu viruses do not normally infect humans, a small number of swine flu virus infections occur in humans each year. Most human cases of swine flu infections have occurred in

The materials are designed to improve knowledge of seasonal flu. All four documents are tailored for low literacy populations by using minimal text and using visual cues to portray seasonal flu information. Visit CDC-INFO to order printed copies of these documents, or call 1-800-CDC-INFO. In the past, CDC received reports of approximately one human infected with influenza viruses that usually are found in swine every one to two years, but beginning in 2012, there was a jump in the number of these cases. (See Case Count: Detected U.S. Human Infections with Variant Influenza Viruses by State since December 2005.)