Rebecca Bredow, 40, objects to vaccinations on religious grounds - which is allowed by most USA states - but last year signed a legal agreement with her ex-husband to get their nine-year-old son up to date with his immunisations, reports CBS.
"It was the worst five days of my life, except for the fact that I just found out that he was vaccinated and I'm not going to get him back today", Bredow said of the vaccinations and her jail term.
In court, she said vaccinating her son goes against all of her beliefs, saying parents have the choice to make the right decision based on their knowledge of vaccines.
"It's been a rough few days to say the least", she added. Horne was given temporary custody of the boy with an order for him to be vaccinated.
Bredow, 40, was in contempt of court after she ignored an order from an Oakland County judge who told her she had one week to get her son vaccinated. She was released from the Oakland County jail early Monday.
Almost half of the states allow for nonmedical exemptions, including MI. Parents and guardians with children enrolled in public and private schools in MI must attend an educational session to learn about the diseases that vaccines prevent before they are allowed to receive a nonmedical waiver. Her attorney plans to appeal.
The judge took away Bredow's primary custody of the child and said she would have to share guardianship with her ex-husband, James Horne, the AP reported.
Horne wanted his son vaccinated and Bredow agreed to do so last November but didn't follow through.
"Never in a million years did I ever think that I would end up in jail standing up to try to protect my kids, and standing up for my beliefs", Bredow told ABC.