Hepatitis A Virus
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- HAV is an RNA virus in the picornavirus family. It is transmitted via the fecal–oral route and is the most common cause of acute viral hepatitis worldwide.
- Large-scale outbreaks because of contamination of food and drinking water can occur.
- A vaccine is available, with two doses given at least 6 months apart.
- The period of greatest infectivity is 2 weeks before the onset of clinical illness.
- Viral shedding in infected patients’ feces continues for 2–3 weeks after the onset of symptoms.