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The Street
The Street
By PR Newswire LEUVEN, Belgium, Dec. 21, 2021 /PRNewswire/ — Scientists from KU Leuven, UZ Leuven and imec warn that, during the first two days after an infection, the result of a rapid antigen test is less reliable than expected. A longitudinal study, including unprecedented molecular tests performed on aerosols, reveals that exhaled viral load (the purported measurement of contagiousness) peaks before rapid antigen tests are reliably positive. The findings imply that people can spread the virus early in the course of an infection while their rapid antigen test is negative. The study is avai…