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The FDA and CDC are recommending use of a third shot, or “booster dose” for certain groups of people in the U.S. Patrick T. Fallon/AFP via Getty Images

Tense decision-making as CDC joins FDA in recommending Pfizer booster shot for 65 & up, people at high risk and those with occupational exposure to COVID-19

Fault lines between the FDA and CDC regulatory processes have been on full display in the decisions over which groups of Americans should receive the Pfizer booster shot.
A little more than 8% of vaccinated people in the U.S. have received the Johnson & Johnson vaccine. SOPA Images/Contributor/Light Rocket via Getty Images

Do I need a booster shot if I got the Johnson & Johnson vaccine? A virologist answers 5 questions

It has been six months since the Johnson & Johnson vaccine received emergency use authorization. What does six months of data show about its efficacy, side effects and protection from variants?
Low-cost air-ventilation systems have been installed in many classrooms across the U.S. to help reduce COVID-19 transmission. Halfpoint Images/Moment via Getty Images

COVID-19 has spurred investments in air filtration for K-12 schools – but these technologies aren’t an instant fix

Air-ventilation upgrades have been badly needed in U.S. classrooms since long before the pandemic. Low-tech filtration systems that cost about the same as a textbook per student can make a big difference.
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Appetite for convenience: how the surge in online food delivery could be harming our health

During the pandemic, Australians have been using food delivery apps more than ever. We’ve assessed how healthy the options available to us are — and the news isn’t good.

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