Cut from an article in the Oz...
Fewer than half of all coronavirus cases are likely being detected, according to a scientific paper which predicts many of those infected will not be diagnosed.
The paper from the Centre for Communicable Disease Dynamics at Harvard T.H. Chan School of Public Health in Boston says as many of 60 per cent of COVID-19 cases around the world are likely going undetected, even in countries such as Australia that have advanced surveillance techniques. “Recent work indicates variation among countries in detection capacity,” the paper says.
“We found that the ability to detect imported cases among high surveillance countries is 40 per cent, among intermediate surveillance countries it is 37 per cent, and among low surveillance countries it is 11 per cent.
“Undetected cases are likely in countries around the world, with greater risk in countries of low detection capacity and high connectivity to the epicentre of the outbreak.”