Testing individuals hours before attending a social event can nearly half COVID-19 transmission rates, a new study by the Yale School of Public Health epidemiologists has found.
Testing individuals hours before attending a social event can nearly half COVID-19 transmission rates, a newResearchers said in the study, published in the International Journal of Public Health on Tuesday, that a negative COVID-19 test taken 72 hours or more before arriving at a location is not enough to protect against transmission and only lowers transmission by around four per cent compared to testing not at all.
“We’re not the first people to say that you should test closer to an event,” Jeffrey Townsend, senior author of the study, said in a. “But this study really nails it down: it matters an enormous amount—and here’s the curve that shows it.” Someone who tested negative, but was unknowingly infected, could quickly spread the virus to others just a couple of hours later, he said.
Townsend and other collaborators employed statistical modelling to see how transmission varied with testing at various intervals. The researchers also evaluated more than a dozen different rapid antigen home tests to determine whether the kind of test individuals use would be a factor in lowering transmission risk.
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