Final answer:
Hepatitis B (HBV) is primarily considered a sexually transmitted disease and can lead to chronic liver issues. Vaccination is recommended for high-risk groups, including children and health-care workers.
Step-by-step explanation:
The type of hepatitis considered to be primarily a sexually transmitted disease is Hepatitis B (HBV). This virus is transmitted through exposure to infectious bodily fluids such as blood, semen, and saliva, often via sexual contact, but it can also be passed from mother to child during childbirth or through other forms of blood-to-blood contact.
The Centers for Disease Control and Prevention (CDC) provide guidelines to reduce transmission, which include vaccination, safe sex practices, and proper use of protective equipment in healthcare settings. HBV can lead to chronic infection, cirrhosis, or liver cancer, making prevention critical. A vaccine is available and is recommended for children and adults at higher risk, such as those with multiple sexual partners or intravenous drug users.