Possible comlications include pneumonia, Reye syndrome, myocarditis, and worsening of chronic pulmonary conditions such as bronchitis and asthma. Hepatitis B. Infection with the hepatitis B virus can result in acute hepatitis, liver failure, cirrhosis, and hepatoma. This is an adult with a liver tumor resulting from infection with the hepatitis B virus. Measles incidence decreased dramatically until 1989 when local outbreaks affected infants and adolescents. This disease is more severe in adults.
Pertussis is endemic and there is an ongoing risk for exposure for all ages.
Morbidity and mortality are highest in young infants. This is a baby with the characteristic lesions of congenital rubella. This infant's muscles are in spasm due to neonatal tetanus. Tetanus is rare but there is an ongoing risk for exposure for all ages.