Face masks: what the data say – Nature   Commentary on Twitter #Facemasks: what the data say.#Masks work, but they are not infallible. You decrease your risk of contagion if you wear them properly AND apply other #hygiene measures, keep your physical distance, and ventilate indoor spaces well.#covid #covid19 https://t.co/uNqehIC2pF — Vanessa Campo-Ruiz, MD PhD […]

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