Messenger RNA COVID-19 Vaccines Linked to Increased Risk of Vaginal Bleeding: Study

COVID-19 vaccines in Gothenburg, Sweden, on Jan. 14, 2021. Fredrik Lerneryd/Getty Images

Women vaccinated with the Pfizer or Moderna COVID-19 vaccines are at higher risk of vaginal bleeding, according to a new study.

One or more doses of the messenger RNA shots increased the risk of the bleeding in women aged 12 to 74, Swedish researchers reported in the study, published on May 3 by the British Medical Journal.