I recently learned I have hepatitis A. Does the hepatitis A virus cause cirrhosis or liver cancer? (Thanh, Tay Ninh province)

My family's favorite dish is bun dau, a dish of rice vermicelli and fried tofu, served with pickled eggplant and fermented shrimp paste. Can consuming a lot of fermented shrimp paste lead to illness, and how can we prevent it? (Ngoc Hanh, 40, Gia Lai).

Dinh Dac, 40, Gia Lai, asks: "I have been vaccinated against hepatitis B. If I have unprotected sex with someone who has the disease, can I get infected?"