Meningococcal disease is a serious bacterial illness. It is a leading cause of bacterial meningitis in children 2 through 18 years old in the United States. Meningitis is an infection of the covering of the brain and the spinal cord.

Pneumococcal disease refers to any illness caused by pneumococcal bacteria. These bacteria can cause many types of illnesses, including pneumonia, which is an infection of the lungs. Anyone can get pneumococcal disease, but children under 2 years old, people with certain medical conditions or other risk

Vaccination can protect older adults (and some children and younger adults) from pneumococcal disease.

Polio (or poliomyelitis) is a disabling and life-threatening disease caused by poliovirus, which can infect a person’s spinal cord, leading to paralysis. Polio vaccine can prevent polio.