Almost all at-home tests were lateral flow ... a positive RAT test. RATs were designed to be taken multiple times in sequence. A PCR, also known as a NAAT or molecular test, measures RNA and can ...

Lateral Flow Tests (LFTs) have become a normal part of life as we learn to live with COVID-19 and ride the Omicron wave. But despite at-home testing reaching record levels in recent weeks - with over ...

Free at-home Covid tests can be ordered starting Monday. Here’s what you should know about when to test and what the results mean as new variants circulate.

In the 1990s, scientists started using molecular tests, including PCR and antigen tests that were not quite like today’s lateral flow assays. These tests still required instrumentation, but they were ...

And many people will be wondering what it means if they see a very faint line on their lateral flow tests. Everyone knows the thick red lines next to the C and the T means you are positive.