https://www.nytimes.com/2020/08/16/health/coronavirus-immunity-antibodies.html?surface=home-discovery-vi-prg&fellback=
Disease-fighting antibodies and special immune cells appear to persist months after coronavirus infections have resolved, new research shows.
“This is exactly what you would hope for,” said Marion Pepper, an immunologist at the University of Washington and an author on another of the new studies, which is currently under review at the journal Nature. “All the pieces are there to have a totally protective immune response.”
Protection against reinfection cannot be fully confirmed until there is proof that most people who encounter the virus a second time are actually able to keep it at bay, Dr. Pepper said. But the findings could help quell recent concerns over the virus’s ability to dupe the immune system into amnesia, leaving people vulnerable to repeat bouts of disease.
Researchers have yet to find unambiguous evidence that coronavirus reinfections are occurring, especially within the few months that the virus has been rippling through the human population. The prospect of immune memory “helps to explain that,” Dr. Pepper said.