(CNN) -- One is widespread but has key shortages across its supply chain. One remains questionably reliable and is only helpful after the fact. And one is still early in development -- but could speed ...

Every American traveling abroad needs to take an antigen test to return to the United States. But the start of the trip is often even more cumbersome, as many other countries (nearly every one I have ...

One is widespread but has key shortages across its supply chain. One remains questionably reliable and is only helpful after the fact. And one is still early in development – but could speed up and ...

Since its invention in the 1980s, polymerase chain reaction (PCR) opened the door for applications such as genetic engineering, genotyping, and sequencing, and has become a fundamental part of ...

With laboratory methods and diagnostics advancing apace, Francesca Lake considers whether PCR is likely to retain its crown as an essential lab method, or whether it could be replaced and consigned to ...