Study on Vaccine’s Impact on Emergency Visits and Hospitalizations

A recent study has revealed that a vaccine significantly lowered the risk of emergency department visits and hospitalizations among healthy adults. This research, focusing on last winter, shows a reduction of about 50% in these medical encounters.

Published on June 23, 2026, the findings appeared in JAMA Network Open, a respected peer-reviewed medical journal. A woman was depicted receiving the Moderna COVID-19 vaccine in Maryland during 2022, captured by Eric Lee for The Washington Post.

The publication of this study came after the CDC’s chief postponed its release earlier in the spring due to concerns about the study’s methodology. Despite these concerns, the analysis was conducted using the previously criticized approach by the CDC’s interim director. Initially, this led to the paper being withheld from the CDC’s weekly scientific report.