air-filtration

Filter - ist HEPA good enough?

A lot of people engage in projects working on masks to protect themselves or others from COVID-19. There is lots of discussion about what kind of filtermaterial to use. The filtermaterial you want to use might depend on the type of risk you want to minimise. If you want others to be protected from you coughing at them a different kind of mask might be sufficient than protecting you from inhaling virus.