RT @CrabbBrendan: Wow, wow. This a must. If you're interested in knowing where you most need a mask (a P2/N95) this is a brilliant guide. Vaccines, testing and isolating if sick, and breathing clean air are the 3 key COVID-19 interventions. The last one is by far the most neglected.

🐦🔗: https://nitter.eu/NChildersMEP/status/1546535317158694912