Vaccination and Immunization
A vaccine is a substance administered to a patient to produce an immune response to a specific disease. The substance usually contains a pathogen in a dose small enough to produce immunity without producing infection. Learn more about what vaccines are in this section.
The strategy against preventing disease begins with childhood immunizations. Find ... read more »
A person’s need for vaccination doesn’t end after adolescence. Learn why experts say ... read more »
Travelers heading abroad are often encouraged or required to receive specific vaccinations before ... read more »