title: Hepatitis epidemic in a hyperendemic zone of Costa rica. Report of a second outbreak within four years.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001500:BCG Vaccine; D002648:Child; D002675:Child, Preschool; D003364:Costa Rica; D004196:Disease Outbreaks; D004197:Disease Reservoirs; D005260:Female; D005506:Food Contamination; D006506:Hepatitis A / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics; D006511:Hepatitis B Antigens / Q000032:analysis; D006801:Humans; D007223:Infant; D008297:Male; D012111:Residence Characteristics; D012621:Seasons; D014611:Vaccination / Q000009:adverse effects; D014871:Water Microbiology; D014881:Water Supply
chemical_list: D001500:BCG Vaccine; D006511:Hepatitis B Antigens