Here's what to know about the latest COVID strain - and how to tell if your at-home test is still good to use.

How it Works: Real Time PCR Brendan Maher The instrumentation is basic: a thermal cycler for amplification, a light source for excitation of fluorescent probes (see chemistries below), a camera for ...

And, by the way, the rapid antigen test he took when he got home that night was negative. Regardless of how you much of a health risk you see in COVID, it is still, at best, an inconvenience that ...

The COVID-19 pandemic yielded important advances in testing for respiratory viruses, but it also exposed important unmet needs in screening to prevent the spread of infections in high-risk settings.

Amid a rise in COVID cases and the start of fall allergies, flu and RSV season, experts say testing is an important tool heading into the cooler month. With more people testing positive for COVID once ...

At the start of the SARS-CoV-2 pandemic people who felt unwell had to join long queues for lab-based PCR tests and then wait for two days to learn if they were infected with the COVID-19 virus or not.

Update, June 20: As of June 1, you can no longer order free COVID-19 tests from the federal government and USPS. A message on the covidtests.gov site says that ordering has “been suspended to preserve ...

The COVID-19 pandemic yielded important advances in testing for respiratory viruses, but it also exposed important unmet needs in screening to prevent the spread of infections in high-risk settings.