Which one of the following statements is not correct?

1. A

   Hepatitis B virus is transmitted much like HIV.

   (a) Hepatitis B virus is transmitted much like HIV — blood, sexual contact, from mother to child. This statement is correct, so it is not the “not correct” key.

2. B

   Hepatitis B, unlike Hepatitis C, does not have a vaccine.

   (b) “Hepatitis B, unlike Hepatitis C, does not have a vaccine” is not correct. Hepatitis B has a widely used vaccine; Hepatitis C does not (as of the paper). That false claim is the official key.

3. C

   Globally, the number of people infected with Hepatitis B and C viruses are several times more than those infected with HIV.

   (c) Globally, people living with HBV and HCV far outnumber those with HIV. This statement is correct, so it is not the key.

4. D

   Some of those infected with Hepatitis B and C viruses do not show the symptoms for many years.

   (d) Many HBV and HCV infections stay silent for years (chronic hepatitis, later cirrhosis or cancer). This statement is correct, so it is not the key.

Summary. Official key is (b). The question asks for the statement that is not correct. Hepatitis B has a vaccine; Hepatitis C did not. HBV transmission resembles HIV; chronic viral hepatitis is more prevalent than HIV worldwide and is often asymptomatic for years. Honour (b).