The Science Behind A 14-Day Quarantine After Possible COVID-19 Exposure

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The Science Behind A 14-Day Quarantine After Possible COVID-19 Exposure
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Researchers say about 99% of the people who get infected with the virus that causes COVID-19 and develop symptoms will do so within 14 days. So the 14-day quarantine after possible exposure is to ensure you haven't developed an infection you could spread.

, professor at the American University Washington College of Law."Fourteen days is not a made up number here — it's based on what we know so far about COVID-19, and it's possible that, over time, we'll see that number change as we learn more [about the virus]."

Canadian border agents are handing people entering the country a sheet from the Public Health Agency of Canada that instructs everyone to self-isolate for 14 days and monitor themselves for any symptoms that might signal a COVID-19 infection.So that 14-day quarantine is what is being considered the outside"safety" margin, Graham says, to be certain you haven't developed an infection that you could spread to others.

An illustration created at the U.S. Centers for Disease Control and Prevention conveys a likeness of the coronavirus that's behind the current pandemic.An illustration created at the U.S. Centers for Disease Control and Prevention conveys a likeness of the coronavirus that's behind the current pandemic."It's still a big black box as to how much asymptomatic spread is contributing to the increased number of cases that we're seeing," Graham says.

"If you're using hand hygiene, you're still practicing social distancing, and all those other infection control measures that are being encouraged right now, you're going to help break that chain of infection," she says."Once you're past that 14 days, you still want to engage in those practices — it's not a free-for-all."

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