From Virus to Vaccination: Bridging Gaps in Influenza Prevention and Practice

Influenza is a highly contagious viral illness of the respiratory tract that typically occurs in late fall, winter, and early spring. It affects millions of people in the United States and millions more worldwide every year. Influenza vaccines can be effective at preventing influenza, decreasing the severity of illness, and may reduce the need for hospitalization. Vaccine efficacy varies based on the influenza variant, the severity of a particular flu season, and differences in the vaccines prepared for that season. Trivalent vaccine formulations are available, including both injectable and nasal spray forms.