CDC

Education

When is it safe to open schools? States have varying answers

As schools across the U.S. decide whether to reopen this fall, many are left wondering how to know if it’s safe. Public health experts say virus rates in the community should be low, but there’s little agreement on a specific threshold or even a measurement. The federal government has largely left it to state and

COVID-19

Slow COVID-19 test results prevent effective contract tracing, health expert says

Arizona has failed to conduct robust contact tracing, which was considered a vital tool to slowing the spread of COVID-19 and proved effective in other parts of the world, public health experts say. And it’s not just Arizona. Contact tracing has “largely failed in the United States” because of long waits for test results and

National

Walmart latest retailer to require customers to wear masks

Walmart will require customers to wear face coverings at all of its namesake and Sam’s Club stores, making it the largest retailer to introduce such a policy that has otherwise proven difficult to enforce without state and federal requirements. The company said Wednesday that the policy will go into effect on Monday to allow time

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