6. What is the relation between age and chronic infection?

It depends on the age at which you get
infected in terms of the probability that you are going to have a
chronic infection. If youâ€™re infected at birth or in the first
few years of life, then you have an extremely high risk of developing
a chronic infection. One of the reasons that in China there are
very large numbers of hepatitis B carriers is that mothers are
infected. They infect their babies at birth or shortly
after birth. And ninety percent of those babies go on to
be chronically infected usually for their lifetime. And that decreases as you get older. So from
one to five years, thirty percent of children who are infected develop
chronic infection. But after five years, that falls to five or
six percent.



5. What is the difference between acute and chronic infection?

7. What is the global pattern of chronic infection?

