Immunity is the crucial question and understanding it will tell us how the pandemic will end.
of people appearing to have multiple coronavirus infections in a short space of time.
Nobody has been deliberately reinfected with the virus to test immunity, but a pair of rhesus macaque monkeys have. But while you will find some antibodies in nearly every patient, not all are equal. Neutralising antibodies are the ones that stick to the coronavirus and are able to stop it infecting other cells. A study of 175 recovered patients in ChinaThat is why the World Health Organization says"that cellular immunity [the other part of the adaptive response] may also be critical for recovery".
Immunity will also affect how deadly the virus is. If people retain some, even imperfect, protection then it will make the disease less dangerous.
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