Vaccinated individuals and those who recovered from severe COVID-19 may be at lower risk for subsequent severe infections with SARS-CoV-2 variants than people who had milder cases, according to a new study in the September 3 issue of Science Advances.
The analysis, which included blood serum samples from 69 COVID-19 patients and 50 fully vaccinated healthcare workers in the Netherlands, found that serum from all study subjects showed a reduced response to the alpha, beta, and gamma variants compared to the original strain.