Both the seasonal flu vaccine and the updated COVID-19 vaccine are recommended annually for nearly everyone ages 6 months and older to prevent severe respiratory illness, hospitalizations, and death.

Kevin Ma, PhD, discusses new data showing 2024–2025 COVID-19 vaccines reduced hospitalization and severe outcomes. In this Q&A, lead study author Kevin Ma, PhD, an epidemic intelligence service ...

As we age, the immune system gradually declines and becomes less effective at responding to infections and vaccines.

COVID-19 variant BA.3.2 or "cicada" is not widely circulating in the U.S. yet, but based on trends in Europe, it may become more prominent. Most evidence comes from laboratory data, but there are no ...