At the very least one of these. Surgical masks useless.
The KN95s (one on the right) are in most pharmacies. They can be reused if rotated for a few days. Remember the NOSE CLIP!
RT @ToshiAkima: 1. Qualitative fit test report on a surgical mask. Outcome: abject failure. The test failed within 5 seconds of a 7-minute OSHA fit test protocol (3M FT-10). In fact, it failed faster than I could start the timer. A record

🐦🔗: https://nitter.eu/NChildersMEP/status/1553996991310479361