Vomiting virus is spreading across most of the U.S.

[Snarkoleptic]

2. I don't want to go all Howard Hughes, but hand washing is essential.

Oral/fecal or oral/vomit are most common methods of tranmission.

https://www.cdc.gov/norovirus/causes/index.html

What causes it

You can get norovirus by accidentally getting tiny particles of feces (poop) or vomit in your mouth from a person infected with norovirus.

If you get norovirus illness, you can shed billions of norovirus particles that you can’t see without a microscope. It only takes a few norovirus particles to make you and other people sick.