Wash hands with soap and water to help stop norovirus
Added
During norovirus season, wash your hands often with soap and water for at least 20 seconds, especially after using the toilet and before eating or handling food. Hand sanitizer alone does not work well against norovirus, so use it only in addition to washing. If you get sick, wait at least 48 hours after symptoms stop before preparing food or caring for others.
The result
Result: CDC: wash hands well with soap and water; hand sanitizer alone does not work well against norovirus; stay out of food prep and caregiving for at least 2 days (48 hours) after symptoms stop.
Source
CDC: How to Prevent Norovirus (opens the original source in a new tab). Check it for the latest numbers before you act.