New York City’s public schools will begin to reopen for in-person learning on Dec. 7, starting with elementary schools for students whose parents agree to weekly tests for the novel coronavirus, Mayor Bill de Blasio announced.

A review of recently published scientific studies includes a detailed imaging analysis to determine how SARS-CoV-2, the virus that causes Covid-19, reprograms infected cells.

The U.S. Food and Drug Administration is alerting clinical laboratory staff and healthcare providers that false positive results can occur with Covid-19 antigen tests.

The number of new Covid-19 cases in the United States last week rose 24% to more than 485,000 while the number of tests performed rose 5.5%, according to a Reuters analysis of state and county reports.

Scientists from Britain’s University of Oxford developed a rapid Covid-19 test able to identify the coronavirus in less than five minutes, researchers said on Thursday, adding the device could be used in mass testing at airports and businesses.

President Donald Trump, under fire over his handling of the coronavirus epidemic, announced that the federal government would ship 150 million rapid tests to U.S. states and warned an increase in positive cases is likely in the days ahead.

The number of tests coming back positive for Covid-19 is topping 25% in several states in the U.S. Midwest as cases and hospitalizations also surge in the region, according to a Reuters analysis.

Global airlines called for airport Covid-19 tests for all departing international passengers to replace the quarantines they blame for exacerbating the travel slump.

The United States set a one-day record with over 1 million coronavirus diagnostic tests being performed, but the country needs 6 million to 10 million a day to bring outbreaks under control, according to various experts.

U.S. manufacturers are sharply increasing production of cheap, fast – but less accurate – Covid-19 tests, aiming for 100 million per month by year-end 2020 that will enable schools and workplaces to significantly expand testing.