Don't panic if you see a lump on your armpit after COVID-19 vaccination, doctors say

As more Canadians receive COVID-19 vaccines, more and more people might encounter a side effect that radiologists want the public to be more aware of: swelling under the armpit, which can show up on mammograms during screenings for breast cancer.
As more Canadians receive COVID-19 vaccines, more and more people might encounter a side effect that radiologists want the public to be more aware of: swelling under the armpit, which can show up on mammograms during screenings for breast cancer.

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