Washington: Anti-hepatitis A virus (HAV) shots give infants immunity for least 10 years, according to latest research.The study found that any transfer of the mother`s HAV antibodies does not lower the child`s immune response to the vaccine.The World Health Organisation estimates that 1.4 million cases of HAV occur worldwide every year.HAV affects the liver and typically occurs in areas with poor sanitation where ingestion of contaminated food or water can transmit the virus, the journal Hepatology reports.Early symptoms include fatigue, fever, abdominal pain, nausea, appetite loss, jaundice, a yellowing of the skin or whites of the eyes, dark urine, through which bile is excreted from the blood stream.In the United States, HAV cases have decreased by 90 percent in the past 20 years, with roughly 20,000 new cases reported each year, thanks to routine vaccination, according to a statement of the Centres for Disease Control and Prevention (CDC).
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