Most infections take between two to 10 days to develop. Norovirus wants you to know it's got you right away. There is no days-long incubation period — we're talking about six hours until symptoms appear. read more
Norovirus is a highly contagious virus. Anyone can get infected with norovirus and get sick. Also, you can get norovirus illness many times in your life. One reason for this is that there are many different types of noroviruses. Being infected with one type of norovirus may not protect you against other types. read more
This period between the norovirus transmission and the start of norovirus symptoms is known as the "norovirus incubation period." In some cases, the norovirus incubation period can be as short as 12 hours after exposure. read more
More usually, the period between infection and displaying symptoms is 24-48 hours. Norovirus (NV) is usually relatively mild but it can cause illness at any age because immunity does not last long. Symptoms The incubation period is usually 24 to 48 hours but, less often, it may be down to 12 hours. read more