🧪You may have heard of serology or a blood test for COVID-19, which is used to detect antibodies or signs of the infection in your blood stream.🧪 This testing can be helpful to identify people who have developed antibodies to the virus or past exposure to the COVID-19 virus. However, these antibodies are not detectable during the early stages of infection, and it may take weeks before they can be detected, so it’s not useful for diagnosing active or infectious cases. Also, not all people who h