James Todaro, MD
7/ This finding was confirmed in yet another study published in Cell in June 2020 showing that 40-60% of unexposed individuals had T cell recognition of SARS-CoV-2. The authors hypothesized that crossover immunity came from “common cold” coronaviruses. https://www.sciencedirect.com/science/article/pii/S0092867420306103?via%3Dihub