A young man has an undescended testis within the abdomen. How does this affect testicular function? What complications may result from this condition? Compare the three major types of viral hepatitis...

A young man has an undescended testis within the abdomen. How does this affect testicular function? What complications may result from this condition?

Compare the three major types of viral hepatitis in terms of their pathogenesis, incubation period, incidence of complications, and frequency of carriers. Explain the diagnostic tests used to identify each type of viral infection, and describe methods of prevention.