Acute onset supraclavicular lymphadenopathy coinciding with intramuscular mRNA vaccination against COVID-19 may be related to vaccine injection technique, Spain, January and February 2021

Author:

Fernández-Prada María12,Rivero-Calle Irene341,Calvache-González Ana5,Martinón-Torres Federico341ORCID

Affiliation:

1. WHO Collaborating Centre for Vaccine Safety, Santiago de Compostela, Spain

2. Vaccines Unit, Preventive Medicine and Public Health Department, Vital Álvarez-Buylla Hospital, Health Care Service of Asturias, Mieres, Spain

3. Genetics, Vaccines and Pediatric Infectious Diseases Research Group (GENVIP), Instituto de Investigación Sanitaria de Santiago and Universidad de Santiago de Compostela (USC), Santiago de Compostela, Spain

4. Translational Pediatrics and Infectious Diseases, Hospital Clínico Universitario and Universidad de Santiago de Compostela (USC), Santiago de Compostela, Spain

5. Digestive Surgery Service, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain

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.

Publisher

European Centre for Disease Control and Prevention (ECDC)

Subject

Virology,Public Health, Environmental and Occupational Health,Epidemiology

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