EPA has adopted emission standards for motor vehicles and certain kinds of nonroad vehicles and equipment. To show compliance with these emission standards, manufacturers must follow test procedures ...

EPA has adopted emission standards for almost every kind of engine, including everything from lawn mowers to cruise ships. To show compliance with these emission standards, engine manufacturers must ...

If you don't feel well, you may worry that you have COVID-19. The only way to know for sure is to take a test. At-home tests can tell whether you have the virus right now. More specialized antibody ...

Each week, we answer frequently asked questions about life during the coronavirus crisis. If you have a question you'd like us to consider for a future post, email us at goatsandsoda@npr.org with the ...

Facing long lines and shortages of home test kits during the latest surge, people are searching for answers about Covid tests. By Tara Parker-Pope Dani Blum and Nicole Stock Testing is essential to ...

The US government has been helping people detect COVID-19 at home for several years with free COVID test kits delivered by the US Postal Service. On Sunday, the Department of Health and Human Services ...

A doctor can diagnose food allergies using a variety of tests, including skin prick tests, blood tests, and oral food challenges. Home test kits are also available, though they have several downsides ...