Testing at least twice a week
maximizes SHIELD’s ability to find infections early and break the transmission
chain. However, if contact tracing is strong at your location, weekly testing can
The more frequently someone is tested, the less time they will be infectious and be able to spread the virus. When testing twice a week, an infection will be detected, on average, the day before peak infectiousness. With weekly testing, infections will be detected, on average, 1-2 days after peak infectiousness. Our research also shows that testing at least twice a week means that >95% of infections will be detected; weekly testing can miss 1 in 10 infections.