The first vaccine to prevent pneumococcal disease in children was added to the U.S. immunization schedule in 2001. Before that, Streptococcus pneumonia bacteria caused about 17,000 cases of bacteremia (blood infections), 700 cases of meningitis, and 71,000 cases of bacterial pneumonia each year. The bacteria can also cause middle ear infections (otitis media).
A major difficulty with large vaccination campaigns is storage and transport of vaccine material.
An online project from The College of Physicians of Philadelphia
In January of this year, staff from the History of Vaccines project traveled to Baltimore along with other College of Physicians staffers to interview D.A. Henderson, MD, who directed a worldwide campaign for the eradication of smallpox—the only disease ever to be wiped out.