Antibodies that fight coronavirus infection last at least four months and do not fade quickly as some earlier reports suggested — a good sign for vaccines.
In exploring coronavirus immunity as the nation reopens, scientists still want to know how long immunity lasts and whether it protects everyone equally.
Previous studies suggesting that antibodies faded quickly were mostly focused on the 28 days after diagnosis and may have been looking at just the first wave of antibodies the immune system produces in response to infection. A second wave of antibodies forms a month or two into infection, and this seems more stable and long-lasting, the researchers report.
The results of the study don’t necessarily mean that all countries’ populations will be the same, or that every person has this sort of response.
Although many studies have been reporting death rates based on specific groups, such as hospitalized patients, the rate of death among all infected with the coronavirus has not been known.
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