Children who attend public schools or state-licensed day cares are required to get vaccinations unless they cite medical or religious reasons for abstaining, officials said. Statewide, about 98 percent of schoolchildren have complied with vaccination rules, according to the Illinois State Board of Education, which collects data from public and nonpublic schools. That percentage includes those who got the vaccine and those who officially opted out of vaccinations for religious or medical reasons, according to the agency.