All states now require proof of immunization or other evidence of immunity against some of these diseases for admission to school. However, the requirements vary from state to state, and exemptions may be granted for medical, moral, or religious reasons.
Immunization is also important for adults.
Tetanus boosters should be administered every ten years. The FDA recently approved LIMErix for individuals between the ages of 15 and 70 who live or work in grassy or wooded areas where ticks bearing Lyme disease are present. In 1977, after a decade-long campaign involving 33 countries, smallpox was eradicated worldwide. Polio may be eradicated by the year 2000. At least ten misconceptions can lead parents to question the wisdom of immunizing their children.