While the U.S. government recently issued it’s fourth round of free rapid COVID test kits this year, Americans who are still in possession of COVID tests they acquired earlier in the year may wonder whether or not the tests have expired.

If you’ve got leftover COVID-19 test kits from when the federal government initially sent out free ones in January, you may be wondering if they’ve expired. We’ve got good news: They’re probably still OK to use. 

Of the 27 at-home COVID-19 tests listed on the FDA website, 15 have had their shelf lives extended, including tests by iHealth, one of the most common at-home test providers.

Below, find out what the expiration dates on at-home COVID-19 test boxes mean and which expiration dates have been extended.  

Read the full article at CNET.

Meanwhile, a new survey conducted by Wakefield Research on behalf of Roche Diagnostics found that two out of three Americans are confused by the differences between polymerase chain reaction (PCR) tests, and rapid antigen tests—the two main types of tests to diagnose respiratory infections. They are likewise confused about when to use them.

However, at least a quarter of those surveyed, many of them parents, do know that the PCR test is the most accurate for detecting the virus that causes COVID-19. Adults with children in their household did slightly better, with 33% of them recognizing PCR tests as the correct answer.

Roche also recently entered into a U.S. focused collaboration with Pfizer to drive awareness and educate on the importance of the timely usage of COVID test kits, available treatment options, symptoms and the high-risk factors that can increase the chance of progressing to severe illness.

According to the Centers for Disease Control and Prevention, nearly 9 out of 10 adults struggle to understand and use personal and public health information because it contains unfamiliar or complex terms.