The biggest problem with mass testing are the false positives. When you're testing 100 million people even a low false positive rate of 0.1% will still mean tha

The biggest problem with mass testing are the false positives. When you're testing 100 million people even a low false positive rate of 0.1% will still mean that 100 000 people will think they're sick when they're not. I once even saw an example where they calculated that when everybody did an HIV test most positives actually would be false positives.