Researchers piecing together how the body’s immune system responds to the virus that causes Covid-19 are exploring a tantalizing effect: Some people who have never encountered the pathogen before appear to be able to mobilize parts of their immune system to ward it off.
That response suggests that infection with other coronaviruses, such as those responsible for severe acute respiratory syndrome, or SARS, and even the common cold, may aid the body’s fight against the new invader. Harnessing the biological processes at play…
