![]() They are often mentioned in connection with proposals like government-issued certificates indicating someone has had COVID-19 and, theoretically, could go back to work because they can’t get it again. The other thing antibody tests can help determine is immunity. ![]() ![]() PCR tests - which show who actively has the virus - do not provide the same information as antibody tests, Koenemann said. That is important information to know, especially when it comes to loosening restrictive public health orders, though modeling can provide some of it, she said. Antibody or serology tests are a surveillance tool for public health officials because they show who’s had the virus and the prevalence of the infection in a particular community, said Karen Koenemann, county public health director.
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