I'm always good on surgical masks, since I keep a couple of boxes on hand (along with goggles) at all times for when I clean out the hen house. You don't want to breath in that dust.
TRH, you may need N-100 masks to keep this virus out, though I havent heard what size the virus particles are.
Size of the virus is irrelevant. The virus doesn't float through the air by itself. It catches a ride on water droplets. Any surgical mask will catch a water droplet, and keep it from being breathed into the lungs. The only perfect solution is a hazmat suit.
