Doctor insights on:
Does it take longer for a very old, unwell person to recover from norovirus? Can it have any effects or complications that might last for a few weeks.e.g. weakening of the immune sytem?
Yes: This is true of almost any disease the old and fragile are more susceptible to viral diseases and bad side effects than the young or well. They are more likely to have worse disease in this case more diarrhea and vomiting and be more likely to get secondary infections because of their weakened state. ...Read more
NoroV Contagion: Whereas the symptoms usually begin 12 to 48 hours after ingesting the virus, there is no evidence that sick persons can become long-term carriers of the virus, but the virus can be in the stool and vomit of infected persons, from the day they start to feel ill to as long as 2 weeks after they feel better." http://www.Health.State.Mn.Us/divs/idepc/diseases/norovirus/basics.Html#duration. ...Read more
Variable: usually 24-48 hours, but sometimes shorter, sometimes longer. Communicable for up to 3 days AFTER symptoms resolve! ...Read more