Washington, Jul 22 (AP) Laboratories across the US are buckling under a surge of coronavirus tests, creating long processing delays that experts say are actually undercutting the pandemic response.

With the US tally of infections at 3.9 million Wednesday and new cases surging, the bottlenecks are creating problems for workers kept off the job while awaiting results, nursing homes struggling to keep the virus out and for the labs themselves, dealing with a crushing workload.

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Some labs are taking weeks to return COVID-19 results, exacerbating fears that asymptomatic people could be spreading the virus if they don't isolate while they wait.

“There's been this obsession with how many tests are we doing per day” said Dr. Tom Frieden, a former director of the Centers for Disease Control and Prevention.

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“The question is how many tests are being done with results coming back within a day, where the individual tested is promptly isolated and their contacts are promptly warned.”

Frieden and other public health experts have called on states to publicly report testing turnaround times, calling it an essential metric to measure progress against the virus.

The testing lags in the US come as the number of people confirmed to be infected globally passed a staggering 15 million on Wednesday, according to data compiled by Johns Hopkins University.

The US leads the world in cases as well as deaths, which stand at more than 142,000 nationwide.

New York, once by far the US leader in infections, has been surpassed by California, though that is partly due to robust testing in a state with more than twice the population of New York.

Guidelines issued by the CDC recommend that states lifting virus restrictions have testing turnaround time under four days. The agency is expected to soon issue new guidelines recommending against retesting COVID-19 patients to confirm they've recovered. “It's clogging up the system,” Adm. Brett Giroir, assistant health secretary, told reporters last week. (AP)

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)