Final answer:
False. A person carrying HBV remains infectious even after 2 years. Precautions should be taken to prevent transmission.
Step-by-step explanation:
The statement “after about 2 years, a person who carries HBV is no longer infectious to others” is False.
HBV (Hepatitis B Virus) is associated with a mean incubation period of 120 days and can be transmitted through exposure to infected blood or body fluids such as semen or saliva.
It can be spread through skin puncture, mucosal contact, or across the placenta.
Those who use intravenous drugs or have sexual contact with an infected individual are at the highest risk of transmission.
HBV can become chronic and may lead to cirrhosis, liver failure, or liver cancer. Infants have a higher likelihood of becoming chronic carriers compared to adults.
Vaccination is available and is recommended for children and adults at greater risk.
Therefore, a person who carries HBV remains infectious to others even after 2 years, and proper precautions should be taken to prevent transmission.