Full article: https://www.ajronline.org/doi/abs/10.2214/AJR.22.27687 

Axillary swelling, tenderness and palpable lymphadenopathy are commonly reported side effects of the COVID-19 vaccination. Alexandra Millet, MD discusses a new study that observed a prolonged duration to resolution of unilateral ipsilateral axillary lymphadenopathy suspected to be related to COVID 19 vaccination. Administration of the Moderna vaccine, receipt of a second vaccine dose after the initial lymphadenopathy presentation, and greater cortical thickness at initial presentation were independently associated with a longer time to resolution following presentation. The findings support a follow up interval of at least 12 weeks for suspected vaccination-related lymphadenopathy as well as not delaying screening mammography due to recent vaccination.