Acute onset supraclavicular lymphadenopathy coinciding with intramuscular mRNA vaccination against COVID-19 may be related to vaccine injection technique, Spain, January and February 2021
María Fernández-Prada, Irene Rivero‐Calle, Ana Calvache-González, Federico Martinón‐Torres
Abstract
Monitoring adverse reactions following immunisation is essential, particularly for new vaccines such as those against COVID-19. We describe 20 cases of acute onset of a single supraclavicular lymphadenopathy manifesting between 24 h and 9 days after ipsilateral intramuscular administration of an mRNA-based COVID-19 vaccine, referred to our WHO Collaborating Centre for Vaccine Safety. Our results indicate that the swelling of supraclavicular lymph nodes following immunisation may constitute a benign and self-limited condition, related to a higher than recommended injection site.
Topics & Concepts
MedicineIntramuscular injectionVaccinationCoronavirus disease 2019 (COVID-19)LymphAdverse effectInjection siteSurgeryImmunologyInternal medicinePathologyInfectious disease (medical specialty)DiseaseLymphadenopathy Diagnosis and AnalysisMycobacterium research and diagnosisMusculoskeletal synovial abnormalities and treatments