Testing sewage can give school districts, campuses and businesses a heads-up on the spread of COVID-19

As the world waits for vaccines against COVID-19, testing wastewater can give communities and smaller locales, such as school districts, valuable signals about infections trends.

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COVID-19: how many infections could returning university students cause?

If nothing is done to reduce university-based Covid-19 infections, each infected student is likely to infect one other person in their household during the winter holidays.

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How do pandemics end? History suggests diseases fade but are almost never truly gone

As ready as you are to be done with COVID-19, it's not going anywhere soon. A historian of disease describes how once a pathogen emerges, it's usually here to stay.

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COVID-19 will probably become endemic – here's what that means

Even if some places reach herd immunity, the virus is unlikely to disappear.

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A COVID-19 vaccine needs the public's trust – and it's risky to cut corners on clinical trials, as Russia is

As Russia fast tracks a coronavirus vaccine, scientists worry about skipped safety checks – and the potential fallout for trust in vaccines if something ends up going wrong.

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Video: What the huge COVID-19 testing undercount in the US means

A recent report by the CDC estimated that the true number of COVID-19 cases in the US could be six to 24 times more than the number of confirmed cases. A public health scholar explains the implications.

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What the huge COVID-19 testing undercount in the US means

A recent report by the CDC estimated that the true number of COVID-19 cases in the US could be six to 24 times more than the number of confirmed cases. A public health scholar explains the implications.

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epidemiology covid-19 coronavirus data health-data

Random testing in Indiana shows COVID-19 is 6 times deadlier than flu, and 2.8% of the state has been infected

A team of researchers from Indiana University performed random testing for SARS-CoV-2 across the state. The results offer some of the most accurate data to date about important aspects of the virus.

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Coronavirus: England's R number is creeping up – does that mean a second wave is on the way?

The R number fluctuates more as case numbers fall.

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What makes a 'wave' of disease? An epidemiologist explains

There's no scientific definition for a wave of disease – and no evidence that the original onslaught of coronavirus in the US has receded much at all.

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