It was found that U.S. veterans receiving the 2024–2025 COVID-19 vaccine were linked to lower risks of emergency department visits, hospitalizations and deaths over six months of follow-up, according to a study published in The New England Journal of Medicine.

The rushed development of vaccines against COVID in 2020 marked a notable scientific achievement, with early clinical trials showing roughly 95% efficacy against symptomatic infection and nearly complete protection from severe disease, according to researchers. However, the virus has evolved significantly since then, and immunity from prior infections and vaccinations has reduced the overall severity of COVID. These changes have contributed to public uncertainty about the ongoing value of annual vaccines.

In the U.S., adult upta

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