Influenza and Influenza Vaccine Epidemiology and Prevention of Vaccine- Preventable Diseases National Center for Immunization and Respiratory Diseases.
Influenza Highly infectious viral illness First pandemic in 1580 At least 4 pandemics in 19th century Estimated 21 million deaths worldwide in pandemic.
Influenza, Hib and Rotavirus Chapters 16,9 and 20.
