Jenny McCarthy lost her cool on live TV on Wednesday night when she raged at medical officials about what she claimed are needless vaccinations.

The bubbly blonde, who is dating Jim Carrey, has become a leading advocate for alternative research into the causes and 'cures' for autism ever since her son Evan was diagnosed with the brain development disorder.

And when the three medical experts disputed McCarthy's claims that childhood vaccinations could be responsible for some autism cases on CNN news show Larry King Live, the actress exploded.

Banging her hand on King's table, she scolded, "The increase (in immunization) is ridiculous, you guys... It's plain and simple. It's bulls**t... Too many shots, too soon. My son 'died' in front of me due to a vaccine injury... and every week I get a picture sent to me of a child, following a vaccination."

McCarthy's five-year-old son was diagnosed with autism when he was two after he suffered a heart attack and was clinically dead for two minutes.

As the medics continued to dispute McCarthy's claims, linking vaccines to autism, the actress leaned across the table and said, "An increase in the measles, I'll take that way over autism any day."

(This news article provided by World Entertainment News Network)