Why Breakthrough COVID? Antibodies Fighting Original Virus May Be Weaker Against Omicron

If you’re wondering why after two vaccination doses and a booster shot, you still got sick from the omicron strain of the virus that causes COVID-19, one possible answer may have been found in a recent study by researchers at Johns Hopkins Medicine and the National Institute of Allergy and Infectious Diseases (NIAID) at the National Institutes of Health (NIH).

With Time and Without Masks, COVID-19 Vaccines Wane in Protection

A study measured effectiveness of COVID-19 mRNA vaccines among health workers, most notably during the emergence of delta virus variant and coincident with end of state’s mask mandate, finding protection waned over time, dropping sharply 6-8 months after full vaccination.