Chickenpox is a viral illness that spreads very easily from person to person. The virus that causes chickenpox can stay in the body after the illness and later cause shingles. Learn about its symptoms and how it's treated.
Meningitis is an infection in the fluid that covers your brain and spinal cord. It may cause headache, stiff neck, irritability, fever, drowsiness, nausea, and vomiting.
