hepatitis B virus infection acute disease acute hepatitis B virus infection https://github.com/monarch-initiative/mondo/issues/9097 acute hepatitis B icd11.foundation:1337277167 NCIT:C157781 ICD10CM:B16 MONDO:0100370 A new infection by the hepatitis B virus, which can be transmitted by direct contact of infected blood with mucous membranes or open areas of the skin. Signs and symptoms may include loss of appetite, joint and muscle pain, low-grade fever and stomach pain. Two to six percent of adults progress to a chronic infection, while 90% of infants become chronically ill. A vaccine is available for those at risk.