The CDC recently updated its guidance on antigen testing in long term care facilities. Importantly, the CDC modified the  to include:  

• When to perform confirmatory PCR tests:  
  • Asymptomatic people who test antigen positive should have a confirmatory test performed.   
  • Symptomatic people who test antigen negative should have a confirmatory test performed.   
• What to do with discordant results.   
• Added new variables to the decision-making process (outbreak, close contact or no outbreak).  
• Provided additional guidance on infection control measures to take in response to test results.

Facilities should adhere to this new guidance when using antigen tests.