Final answer:
A child with fever and parotitis likely has mumps. Complications of mumps include orchitis, meningitis, and pancreatitis. Rubella can cause congenital rubella syndrome. Chickenpox can lead to pneumonia and encephalitis. Measles can cause pneumonia, encephalitis, and SSPE.
Step-by-step explanation:
The child with fever and parotitis is likely to have mumps. The complications of mumps include orchitis, meningitis, and pancreatitis. In the case of rubella, which is also known as German measles, the complications include congenital rubella syndrome, which can cause birth defects, miscarriage, or stillbirth. Varicella, also known as chickenpox, can lead to complications such as pneumonia and encephalitis. Lastly, measles can lead to complications like pneumonia, encephalitis, and subacute sclerosing panencephalitis (SSPE).