Sometimes knowing that you have everything you need if disaster strikes will help you get through it. Here is a list of the things that I found essential when we had a stomach bug run though the house in February 2014.
First of all, anyone with kids should have a waterproof mattress cover on each bed at all times. They are inexpensive and can be purchased at Walmart. I personally prefer to keep children who are just vomiting, in their own beds/rooms to quarantine them. I give them a plastic trash can lined with a white draw string trash bag to throw up into. Every time they throw up, I change the bag. (I would be there with gloves on and a face mask.) However, if the person is having diarrhea too, they will need to be in the bathroom (unless it is a young child in diapers).
Stomach Flu Survival/ Preparedness Kit (many items available on amazon)
DISPOSABLE Face Masks like these
Tall white draw string kitchen trash bags to line trash cans (to throw up in).
Gatorade or Pedialyte
Clorox Hydrogen Peroxide Spray (can be used on carpet and kills norovirus)
Chlorine bleach--for laundry and cleaning
Prescription of dissolvable Zofran tablet to stop excess vomiting.
New toothbrushes and toothpaste
Rubber bands to hold hair out of the way
Here are other essential items that you should try to have on hand.
Plastic trash cans to put by people's beds
Large black trash bags to carry soiled laundry and bedding to the washer.
Lots of towels to cover carpet.
Spare sheets and waterproof mattress covers to change beds after the initial surprise throw up at 2am.