A: If an antibody test is negative and shows no antibodies are in your blood, you were likely not infected with COVID-19, you may have been tested early in your infection, or your body has not made enough antibodies to be detected by the test. Because of this, it is important to still practice social distancing.
It takes about 7-10 days for COVID-19-related IgG antibodies to be detected in the blood of someone who is infected with the virus that causes COVID-19. Testing people who are not sick yet or who are very early in their infection can result in large numbers of false negative test results because they have not yet developed antibodies to the virus. This means, you could still be infected with COVID-19 even if your test result is negative, especially if you have been in contact with someone who tested positive for COVID-19 or you have symptoms of it.
If you get sick with symptoms of COVID-19 (like a fever, cough, shortness of breath, muscle aches, sore throat, or a decrease in your sense of smell or taste), you may need to be tested for COVID-19 with a PCR test. A PCR test is done by a healthcare worker who uses a nasal swab to collect a sample of secretions from the uppermost part of your throat, behind your nose. Call a healthcare provider or visit coronavirus.utah.gov/testing-locations/