Limit snow shoveling to less than 10-15 minutes in colder temperatures, with special attention to taking frequent breaks and making sure to drinkplentyoffluids prior to, and after the activity.
Either way, when you are sick with a virus whether it is flu or norovirus, you should stay home, isolated yourself from others, wash your hands frequently, drinkplentyoffluids, and watch our coverage of the outbreak on TV.