Polio, also known as poliomyelitis or infantile paralysis, is an infection of the spinal cord that can, in 1 to 2 percent of cases, lead to paralysis or death.
Outbreaks of polio do still occur in this country, and infants should receive two or three doses of live vaccine (Sabin, containing types 1, 2, and 3). The first dose should be given at two months, with the second and third doses separated by intervals of six weeks to two months. This vaccine is given by mouth, not as an injection. A booster dose should be given at the age of four to six years. Children who were not immunized in infancy should receive a total of three or four doses, depending on their ages. The Sabin vaccine is undoubtedly safe for children.
Adults who are not immune and who plan to travel to a country where polio is uncontrolled should also be immunized. In fact, all adults should be immunized against this disease. Some medical authorities believe that the risk of an adult being exposed to polio is minimal, and therefore adult immunization is unnecessary. However, too many cases of polio have occurred in adults over the age of 30 to make this argument acceptable.
The Sabin vaccine does carry a slight risk of polio for adults. However, the Salk vaccine (which is a dead vaccine) does not. Adults who are not immune should receive an initial series of Salk vaccine to acquire temporary immunity, followed by a full series of Sabin vaccine for permanent protection.
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