A biologist's explainer of how coronavirus spreads, and why wearing any sort of mask - even a cloth mask or scarf - could help stop it.https://t.co/2xw0Qc7YDy— Noah Smith ππΊπΈπΊπ¦ (@Noahpinion) March 31, 2020
A biologist's explainer of how coronavirus spreads, and why wearing any sort of mask - even a cloth mask or scarf - could help stop it.https://t.co/2xw0Qc7YDy