COVID vaccine side effects in breast cancer patients: what 714 survivors reported

NCT ID NCT04872738

First seen Jan 10, 2026 · Last updated Jun 08, 2026 · Updated 18 times

Summary

This study asked 714 breast cancer survivors about their experiences with the COVID-19 vaccine. Researchers wanted to understand if lymph node swelling—a common vaccine side effect—caused worry or raised the risk of lymphedema (arm swelling) in these patients. The study collected data on where patients got the shot, side effects, and how long they lasted.

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Contacts and locations

Locations

  • Massachusetts General Hospital Cancer Center

    Boston, Massachusetts, 02114, United States

Conditions

Explore the condition pages connected to this study.