Hepatitis A virus (HAV) is a picornavirus transmitted via contaminated food/water and fecal-oral route. It has a short incubation period, typically causes acute illness with good prognosis, no HCC risk, and liver biopsy may show lymphocytic infiltration and portal inflammation.
A型肝炎病毒（HAV）：屬於Picornaviridae科，通過受污染的食物和水、糞口途徑傳播。潛伏期較短，臨床過程通常為急性，預後良好，無HCC風險。肝臟活檢可見淋巴細胞浸潤、門脈區炎症和 the portal triad。
| Front | Hepatitis viruses HAV: Family: Transmission: [3 risks] Incubation: Clinical course: 2 Prognosis: HCC risk: Liver Biopsy: 3 Notes: |
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