Remember that there is a difference between hand washing and PROPER hand washing! A few guidelines to keep in mind:
-Hot Running Water (at least 100 degrees)
-Use Soap
-Scrub hands and arms for AT LEAST 10-15 SECONDS- this is the step that gets skipped most often, 10-15 seconds is longer than it seems.
-DRY hands using either a forced air hand dryer OR a single use paper towel
The total process should take around 20 seconds!
only chlorine bleach kills norovirus, so you can use all the alcohol based sanitizer you like, it won't kill norovirus. Proper hand washing however, will wash the virus away. With that being said... It is super contagious, and it is transferred by person-to-person contact as well as water particles in the air, so all you have to do is WALK by a place where someone got sick from norovirus and you can ge sick.
Stay home or away from the parks if you have GI symptoms, and wash your hands!