<Tr> <Td> no data <10 10--20 20--40 40--60 60--80 80--100 </Td> <Td> 100--125 125--150 150--200 200--250 250--500> 500 </Td> </Tr> <P> Hepatitis B virus infection may be either acute (self - limiting) or chronic (long - standing). Persons with self - limiting infection clear the infection spontaneously within weeks to months . </P> <P> Children are less likely than adults to clear the infection . More than 95% of people who become infected as adults or older children will stage a full recovery and develop protective immunity to the virus . However, this drops to 30% for younger children, and only 5% of newborns that acquire the infection from their mother at birth will clear the infection . This population has a 40% lifetime risk of death from cirrhosis or hepatocellular carcinoma . Of those infected between the age of one to six, 70% will clear the infection . </P> <P> Hepatitis D (HDV) can occur only with a concomitant hepatitis B infection, because HDV uses the HBV surface antigen to form a capsid . Co-infection with hepatitis D increases the risk of liver cirrhosis and liver cancer . Polyarteritis nodosa is more common in people with hepatitis B infection . </P>

Hepatitis b is most commonly transmitted via which of the following routes