SARS-CoV-2 RT-PCR tests are the gold standard of COVID testing. We recommend this test be used in the following situations:
1- Someone has exposure to someone with COVID-19 (wait 4-7 days from last exposure prior to testing to avoid a false negative).
2- Someone has signs or symptoms consistent with COVID-19.
3- Pre and post travel or routine screening of asymptomatic people.
It is important to remember that no COVID-19 test is perfect and and false negative results are possible.