Polrat WilairatanaMahidol University2018-07-042018-07-041996-03-01Southeast Asian Journal of Tropical Medicine and Public Health. Vol.27, No.1 (1996), 202-203012515622-s2.0-0030090568https://repository.li.mahidol.ac.th/handle/20.500.14594/17752An acute hepatitis A patient with negative HAV-IgM antibody on presentation is reported. The antibody was measured again 11 days later and became positive. To confirm the diagnosis of hepatitis A with negative HAV-IgM antibody at early stage, the second antibody test approximately 2 weeks apart should be performed.Mahidol UniversityMedicineArticleSCOPUS