Recovered COVID patients may have immune memory for up to 8 monthsIn a US study published today in Science, researchers detected immune memory to SARS-CoV-2 across all immune cell types studied for as long as 8 months after patients became ill with COVID-19.In the study, a team led by researchers from the La Jolla Institute for Immunology in California analyzed levels of antibodies and other cells involved in immune response to the novel coronavirus in 254 specimens from 188 recovered adult COVID-19 patients, including 43 samples taken 6 months or more after infection.Recruited from sites across the United States, study participants had a range of COVID-19 illness severity, from asymptomatic to severe, although most had mild cases.