Moderna vaccine causing delayed rash in some recipients, small study says

Some recipients of Moderna's COVID-19 vaccine experience delayed rashes that can take about six days to heal, according to a small study published March 3 in the New England Journal of Medicine.

Researchers from Boston-based Massachusetts General Hospital examined 12 patients who developed a rash at the injection site eight or more days after receiving their first dose of Moderna's COVID-19 vaccine. Their symptom onset ranged from four days after receiving their first dose to up to 11 after receiving their first dose.