Why Mammograms Show False Positives After COVID Vaccine

The organization shared on its website that swollen lymph nodes, as well as skin reactions near the injection site, have only been found in those who received either the Moderna or Pfizer-BioNTech vaccines — both of which use the technology called mRNA. So far, there have not been reports of these symptoms in people who have received the Johnson & Johnson vaccine. According to The New York Times, Moderna’s study showed that 11.6% of patients reported swollen lymph nodes after the first dose, and 16% reported the symptom after the second dose. Pfizer-BioNTech recipients reported lower incidences, with only 0.3% of people saying they experienced swollen lymph nodes. It was a recognized side effect in large trials of both vaccines.

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