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Why indoor spaces are still prime COVID hotspots

Risks shoot up when virus particles accumulate in buildings, but it’s not clear how best to improve ventilation.
  1. Dyani Lewis

    1. Dyani Lewis is a freelance science journalist in Melbourne, Australia.

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Primary school pupils wear jackets as they work in their classroom with the window open

Children work with coats on inside a school in Germany that has open windows to improve ventilation. Credit: Ina Fassbender/AFP/Getty

When Lidia Morawska leaves home, she takes with her a slick, shoe-sized device that provides some sobering insights about the restaurants and offices she visits. Outside these buildings, her carbon dioxide monitor reads just above 400 parts per million (p.p.m.). But indoors is a different story.

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Nature 592, 22-25 (2021)

doi: https://doi.org/10.1038/d41586-021-00810-9

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