The government budgeted $611 million in 2015 for the federal purchase and distribution of vaccines for uninsured children and adults, which is authorized by Section 317 of the Public Health Service Act.
The proposed cut for 2016 is relatively modest, but would reduce the number of immunizations provided free of charge at local, state and national levels.
In an interview Sunday, Obama called on all parents to vaccinate their kids, warning that allowing a segment of the population to remain unvaccinated threatens the safety of everyone.
While there are no concrete estimates for how many children have gained coverage under Medicaid or CHIP -- the Children's Health Insurance Program – specifically as a result of the Affordable Care Act, experts say the law has significantly expanded access to the programs for the uninsured and their families.
The rate of uninsured children in America has been cut in half in the past 15 years, according to the Kaiser Family Foundation, which estimates 8 percent of U.S. children between the ages of 1 and 18 have no health insurance.