At this point in the pandemic, medical experts agree that getting COVID testing done quickly is vital to being able to keep outbreaks at bay. Test results help doctors and officials spot new cases and isolate patients before they can spread the disease. That's why the Centers for Disease Control and Prevention (CDC) had recommended that anyone who tested positive for COVID-19 should self-isolate until they eventually test negative for the virus not once, but two times. But recently, the CDC announced that patients can now instead end their isolation 10 days after they first show symptoms, without needing negative test results. So, what's the reasoning behind the CDC isolation guideline change? Well, it all comes down to the details of the testing process, says John Brooks, MD, Chief Medical Officer of the CDC's COVID-19 response.

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