The US should be performing as many as 200 million Covid-19 tests every month well into next year to have any chance of controlling the pandemic, experts say in a new report. That number is far beyond the country's current capacity, according to the report released Wednesday by the Rockefeller Foundation and the Duke-Margolis Center for Health Policy. "The U.S. will likely need very large numbers of all types of Covid-19 tests well into 2021 to contain outbreaks while returning toward normal activity, with a particular need for more screening tests that have very fast turnaround times," the report reads.