Jenny McCarthy's invitation to join 'The View' has sparked outrage.

The former Playboy playmate, who claims her 11-year-old son used to have autism, has strongly campaigned against vaccination for children as she believes it can cause the disease, and many people have expressed their concern at the idea of Jenny voicing her non-scientific opinions on the American talk show.

ABC News contributor Ronald Bailey wrote: ''This is really bad news for America's children ... Because some parents have been bamboozled by McCarthy's scientifically bogus claims, infectious diseases like whooping cough and measles are now on the increase.''

Non-profit organisation Every Child by Two, who have begun a campaign to urge parents to vaccinate their babies, sent a letter on Monday to producers of 'The View' warning them of the potential consequences of having her on the show.

According to NYTimes.com, the letter read: ''Ms. McCarthy's unfounded claims that vaccines cause autism have been one of the greatest impediments to public health in recent decades.

''These false assertions, in addition to her condemnation of public health officials and the medical community over all, has spread fear among young parents, which has led to an increased number of children who have not received lifesaving vaccines.''

Jenny's invitation wasn't unexpected as she has frequently appeared as a host on the programme. She will fill one of the empty chairs left by Joy Behar and Elisabeth Hasselbeck, both of whom were regulars on the programme.

She is expected to take up her new role on September 9.