Today, reverse transcription polymerase chain reaction (RT‐PCR) is the COVID‐19 diagnostic test. 2 ,  7  RT‐PCR sensitivity is highest for testing bronchial alveolar lavage fluid (93%) and declines for sputum (72%) and nasal swab (63%) specimens. 10  COVID‐19 diagnosis might require repeat testing. 2 ,  7  Serological tests to detect SARS‐CoV‐2 IgM and IgG antibodies are available. However, because of test sensitivity and other quality concerns, the US Food and Drug Administration (FDA; https://www.fda.gov) advises current serological tests are best used for surveillance and research, and not as the sole basis for COVID‐19 diagnosis.