For more than 30 years, there has been a vaccine that can safely prevent pneumococcal disease, a serious infection caused by a bacterium known as Streptococcus pneumoniae. But the PPSV vaccine (pneumococcal polysaccharide) cannot be used for the part of the population that is most vulnerable to the disease -- children under age 2. Without the protection of a vaccine, infants and very young children are at higher risk for several dangerous infections, including pneumonia and bacterial meningitis.
You are bitten by an animal or wounded by an object that might be contaminated with dirt, feces, or dust, and you have not been immunized against tetanus or received a booster within the last five years. Tetanus infection can be fatal and should be treated as soon as possible.
CDC: "Tetanus (Lockjaw) Vaccination."
National Network For Immunization Information: "Diphtheria, Tetanus, Pertussis (DTaP)."
National Association for Infectious Diseases: "Tetanus (Lockjaw)."