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What are the symptoms of norovirus, how to spread it, and what is the harm to the human body

Norovirus is a group of Caliciviridae viruses, formerly known as' Novak like virus'. Norovirus infection affects the stomach and intestines, causing gastroenteritis or 'gastrointestinal influenza' Gastrointestinal influenza 'is different from influenza, which causes respiratory diseases.

Symptoms and hazards of norovirus infection:

Norovirus infection causes gastroenteritis, which refers to the inflammation of the stomach, small intestine and large intestine. The symptoms of gastroenteritis are nausea, vomiting and abdominal spasmodic diarrhea. Some people complain of headache, fever, chills and muscle pain. Symptoms usually last 1-2 days. It is generally felt that the condition is serious and severe vomiting occurs many times a day. Symptoms generally appear 24-48 hours after virus ingestion, but symptoms may also appear 12 hours after exposure. There is no evidence that the infected person can become a long-term virus carrier, but the virus can be detected in the feces and vomit of the infected person from the onset to 2 weeks after recovery.

The main ways of transmission are:

1. Infectious food poisoning and infectious gastroenteritis.

2. Raw food shellfish and oysters and other aquatic animals.

3. Vomit and feces of patients with non bacterial acute gastroenteritis, or infection through dust after drying.