How can a mask protect against a virus, including Coronavirus? Between the surgical mask and the FFP2 respirator, which mask offers the best protection? Also, with the mask shortage at the beginning of the pandemic, new alternatives to those masks have appeared:  the “barrier mask” and the face shields. How effective are they against COVID-19? … Continue reading COVID-19. All You Need to Know About Surgical Masks, FFP2 and Their Alternatives