An antibody test, on the other hand, looks for levels of Covid-19 antibodies in your blood. When a person gets an infection, their immune system can produce specific proteins, called, to target the invader, in this case a virus. The antibodies that are associated with Covid-19 take one to three weeks to develop.
Experts say it's too soon to know what level of antibodies could provide immunity from future infection, or even how long that potential protection would last. While the presence of antibodies likely means that you had Covid-19 at some time, "we're reluctant to say that you're immune and you won't get infected again," Beuther says.
Additionally, with antibody testing, the chance of getting a false-positive test result is high.
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