Between 2004 and 2008, about 49 percent of children ages 2 months to 2 years were "undervaccinated," meaning they received at least one vaccine or more a month later than is recommended by the current vaccine schedule. The percentage of undervaccinated children increased during the study period.
In about 13 percent of cases analyzed, parents intentionally delayed their child's vaccination, the researchers said.
Some parents say they intentionally delay vaccinations, because they are afraid their child is getting too many vaccines in too short a period, said study researcher Jason Glanz, a senior scientist at Kaiser Permanente's Institute for Health Research. However, research does not support such concerns — an Institute of Medicine report released last week found children who receive their vaccines on time are not at increased risk for medical conditions, such as developmental disorders.
A very dangerous game these parents are playing with the future of their children.