The HEPA filter would prevent germs from being sucked in and blown onto your hands. I guess there might be issues with germs in the sink becoming aerosolized, b

The HEPA filter would prevent germs from being sucked in and blown onto your hands. I guess there might be issues with germs in the sink becoming aerosolized, but if the sink basin was designed properly it could become a sort of funnel so that the "dirty" air could be sucked away, separated from waste water and maybe filtered before being released back into the bathroom.