Norovirus is a contagious viral infection that primarily affects the stomach. It can cause unpleasant symptoms, but is typically short lived and resolves within 48 hours. Unlike viruses Norovirus is highly contagious & can cause unpleasant symptoms. If you’re experiencing symptoms of norovirus, walk into AFC Lyndhurst for same-day care in Lyndhurst, NJ. that provide long-term immunity after infection, norovirus has many strains, and immunity is usually short-lived. This means that after you recover from ...