How reliable is that Covid-19 rapid-test result? Here’s what to know.
Since the start of the Covid-19 pandemic in 2020, the scientific understanding of its transmission and prevention has evolved. WSJ’s Daniela Hernandez explains what strategies have worked for stemming the spread of the virus and which are outdated in 2022.
Illustration: Adele MorganWhen my 14-year-old son had a sore throat and congestion recently, I whipped out aNegative. The next day I tested him again. Negative. Days later when his friend tested positive for Covid-19 and my son still had cold symptoms, we
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