Rebecca Bredo says she and her now-ex-husband made the decision to space out and delay some vaccines for their son when he was born nine years ago.
Now that they are divorced, a disagreement over that decision has turned into a court battle.
The child's father now wants their son vaccinated.
A judge has ordered Bredo to vaccinate her child or face time in jail.
"I feel angry," she said. "I feel backed into a corner. I feel like my rights as a parent have been taken away."
The state of Michigan allows religious, personal and medical exemptions for parents who chose to delay or skip a vaccine.
The CDC says the current U.S. vaccine supply is the safest in history.