Nurse Sue French gives a demonstration of how to perform a rapid antigen test at home. If you have Covid-19 symptoms but test negative with a rapid antigen test, you should test again 1-2 days later, or on day four of feeling crook, new research suggests. Unsplash A US study found symptomatic people with an initial negative RAT should test again 1-2 days later, because test sensitivity peaked several days after illness onset and improved with repeated testing. Overall antigen test sensitivity was 50%​ during the infectious period, the study found. Rapid antigen testing is currently the primary method of testing for Covid-19 in Aotearoa.

Source: Stuff April 30, 2022 03:06 UTC