People testing negative for Covid-19 despite exposure may have ‘immune memory’

Study says some individuals clear virus rapidly due to a strong immune response from existing T-cells, meaning tests record negative resultCoronavirus – latest updatesSee all our coronavirus coverageWe all know that person who, despite their entire household catching Covid-19, has never tested positive for the disease. Now scientists have found an explanation, showing that a proportion of people experience “abortive infection” in which the virus enters the body but is cleared b