Two types of COVID-19 tests, the rapid antigen test and the polymerase chain reaction (PCR) test, are available in the United States. The PCR typically relies on lab testing and is still considered ...

At-home Covid tests can be ordered for free starting Monday. Households can now order four free tests for home delivery at COVIDTests.gov. According to the government website, orders will begin ...

PCR technology is a molecular diagnostics technology that detects target nucleic acids by amplifying the DNA amount. It has brought marked progress in the life sciences field since its development in ...