People with covid-19 appear to be most contagious 15 hours before their symptoms start, and many people may not even go on to develop noticeable symptoms
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https://www.newscientist.com/article/2238473-you-could-be-spreading-the-coronavirus-without-realising-youve-got-it/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
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