Getting COVID-19 Can Weaken the Immune System

Even relatively easy bouts with COVID-19 can still take a toll on the immune system, according to a paper published Mar. 15 in the journal Immunity—particularly on T-cells, which provide long term and durable protection against viruses.

Mark Davis, a professor of immunology at Stanford University and director of the Stanford Institute for Immunity, Transplantation, and Infection, and his team made the discovery when studying T cell responses to SARS-CoV-2 among 72 people through the early months of 2021, as the first COVID-19 vaccines were becoming available. They used the most sensitive method available to track changes in T cell responses, relying on an engineered molecule that can detect up to five-fold more T cells targeting SARS-CoV-2 than other molecules. The …