Overall, the number of asymptomatic infections among tested populations was relatively low — 0.25 percent or one in every 400 people. “These findings suggest that asymptomatic infections might contribute to the transmission of SARS-CoV-2 within the community,” Prof Liu says. “Our results could raise awareness among the public and policy makers and provide evidence for prevention strategies,” Prof. Liu says. “Screening for asymptomatic infection is required, especially for countries and regions that have successfully controlled SARS-CoV-2. Asymptomatic infections should be under management similar to that for confirmed infections, including isolating and contact tracing.”South West News Service writer Mark Waghorn contributed to this report.