With millions of tests being done worldwide, seems it is possible that someone tests negative for antigen and was truly not infected. But then be infected after testing and be asymptomatic. Wouldn't this mean that testing of health care providers would need to be done multiple times as they are potentially exposed daily at work?
Also, what is sensitivity and specificity of antibody testing for those who supposedly recovered and are "immune". I read that some of these antibody tests are not actually testing for presence of Covid-19 antibodies but elevated IgG and other immunoglobulins. Wouldn't these be elevated with other viral infections?
Also, what is sensitivity and specificity of antibody testing for those who supposedly recovered and are "immune". I read that some of these antibody tests are not actually testing for presence of Covid-19 antibodies but elevated IgG and other immunoglobulins. Wouldn't these be elevated with other viral infections?
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