Kristin Cavallari isn't backing down from her stance on vaccinating child.

The 27 year-old appeared on 'Watch What Happens Live' this past Tuesday (March 18th), and was quickly probed to explain her anti-vaccination stance.

"We got a lot of questions about your stand on vaccines," host Andy Cohen said to the reality TV star.

"How can you knowingly support the spread of potentially deadly diseases by not vaccinating your children?'" Cohen read from a viewer's question.

"Well, here's the thing," Cavallari explained. "At the end of the day, I'm just a mom. I'm trying to make the best decision for my kid. There are very scary statistics regarding what is in vaccines and what they cause. Asthma, allergies, ear infections, all kinds of things."

This judgemental reaction to the mother of 18 month-old son, Camden, stems from an interview she took part in last week, (march 13th).

Cavallari received backlash after telling 'The Independents' host Lisa Kennedy Montgomery that she won't vaccinate her children.

The former 'The Hills' star, who is currently pregnant with her second child, said she and husband Jay Cutler, "decided not to vaccinate."

"You know what, I've read too many books about autism," Cavallari continued. "There is a pediatric group called Homestead or, shoot, Homestead or Home First -- now I have pregnancy brain, I got them confused."

Adding, "But they've never vaccinated any of their children and they've never had one case of autism. And now, one in 88 boys is autistic, which is a really scary statistic."

Kristin is not the only celebrity who shares this stance, Jenny McCarthy has been against vaccinating children since 2005 when her son, Evan, was diagnosed with Autism. She believes the vaccine could have potentially caused her child to get the condition.

MORE: Jenny McCarthy slams claims that she lied about her son's autism

However, McCarthy was also exposed to the public's backlash recently. After asking her Twitter followers a question and instructing them to respond with the hastag #JennyAsks, most users sarcastically replied by taking a shot at 'The View' co-host for being against vaccinations.

Kristin Cavallari
Cavallari with her son, Camden