Dr. Parkinson said, “We’ve seen this type of swelling on scans before, but never so pronounced because of one type of vaccine,”(7)
Axillary adenopathy seems to be a common side effect of receiving the vaccine. However, this doesn’t necessarily mean that it’s normal. Dr. Parkinson said himself that this has never been observed from a single vaccine before.
There is no study to observe the long-term effects of swollen lymph nodes to this degree, yet. The SBI recommends waiting 4-12 weeks after receiving the second dose of a COVID-19 vaccination because it takes approximately that long for the swelling to go down.
The statement from the SBI also mentions that, “If axillary adenopathy persists after short term follow up, then consider lymph node sampling to exclude breast and non-breast malignancy.” (8)
This could mean that there is a slight chance that the swelling takes longer to go down or might never go down which would signal a larger underlying issue.
Since there no real study observing the COVID-19 vaccination’s role in axillary adenopathy and its long-term effects, people’s approach to this vaccination should be with caution.