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Smirking social-media pundits knock the new host for her controversial views on vaccines. 
  
 Twitter is needling Jenny McCarthy. 
  
 Soon after the announcement that the outspoken TV personality was joining the panel on ABC's The View, the micro-blogging site became swarmed with snark from entertainment industry jokers and media mavens alike. 
  
 Jokes mostly focused on the 40-year-old mom's controversial views on vaccines. She has claimed that a vaccination triggered her son's autism, medical evidence to the contrary. Here are some choice tweets: 
  
 Congrats ABC for hiring vaccine crank Jenny McCarthy for her "outrageous … fresh POV," bc actual medical science is so stale and dull — James Poniewozik (@poniewozik) July 15, 2013 
  
 @MoRocca Unlike her kids, who are immune to nothing #idiautism — David Kenniston (@Vertigo_Shtick) July 15, 2013 
  
 "Congrats to Jenny McCarthy on The View! We're proud to have one of our best allies in such a prominent position." - communicable disease — Jon Lovett (@jonlovett) July 15, 2013 
  
 Why WOULDN'T parents take vaccination tips from somebody whose favorite joke is "I paid for my fake breasts" (LOL)? Congrats Jenny McCarthy! — Julie Klausner (@julieklausner) July 15, 2013 
  
 "Hmm. Child killers, child killers. Is John Wayne Gacy …? Not female. Susan Smith? Out of the demo. Ooh! Jenny McCarthy!" -The View casting — Julie Klausner (@julieklausner) July 15, 2013 
  
 The View, Brought to You by the Measles, Mumps, and Rubella. — Jon Lovett (@jonlovett) July 15, 2013 
  
 In honor of Jenny McCarthy, The View's cast will spend their next episode interdicting donated vaccine shipments and lighting them on fire — Kevin Lincoln (@KTLincoln) July 15, 2013 
  
 ABC and the View should be ashamed of themselves. Jenny McCarthy deserves to be on some History conspiracy show, not network television. — Harry Enten (@ForecasterEnten) July 15, 2013 ||||| NEW YORK — Less than a week after Elisabeth Hasselbeck said her goodbyes after 10 years on "The View," another divisive blond has joined the daytime talk show. 
  
 On Monday, Barbara Walters confirmed the rumors that Playboy model-turned-anti-vaccine-crusader Jenny McCarthy would officially become a co-host on "The View" when it launches its 17th season on Sept. 9. 
  
 "We love her because she's fun and uninhibited and opinionated enough to help us begin the latest chapter in 'The View' history," Walters said on the air of McCarthy, who has made 17 appearances on the show, including eight as a guest co-host. 
  
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 "Uninhibited" and "opinionated" are certainly two ways of describing McCarthy, but her detractors are more likely to use harsher language. 
  
 Though she launched her own little-watched talk show on VH1 in February, McCarthy has remained in the spotlight — and come under fire — in recent years thanks mostly to her support for the discredited theory that childhood vaccinations cause autism. 
  
 It's a stance that could prove more controversial than anything the conservative Hasselbeck or her liberal colleague Joy Behar ever said on "The View." 
  
 Watched by some 3 million viewers a day — most of them women, many of them mothers — the show is known for spirited conversations about hot-button issues, and there are few topics as heated as the vaccine debate. Though it's unlikely the subject will come up every day, or even very often, the mere fact that McCarthy is being given a national platform is enough to worry some of her critics. 
  
 "I think a network hiring a homicidal maniac, giving her a forum in front of people who have young children and are impressionable, is the most irresponsible thing I've heard of in a long time," said Michael Specter, a New Yorker magazine staff writer and author of the book, "Denialism: How Irrational Thinking Hinders Scientific Progress, Harms the Planet, and Threatens Our Lives." 
  
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 McCarthy wasn't always so polarizing. A 1994 Playmate of the Year, she rose to fame as co-host of the MTV dating show "Singled Out," where her raunchy sense of humor and buxom blond looks made her popular with men and women alike. 
  
 After leaving that program, she dabbled in TV and film roles until 2005, when her son, Evan, was diagnosed with autism. A self-styled "mother warrior," McCarthy has since written several books about the disorder and remains perhaps the best-known celebrity advocate of the theory tying autism to vaccinations. 
  
 She is president of Generation Rescue, a nonprofit group that supports this view, and has also publicly defended Andrew Wakefield, the former doctor who authored the 1998 journal article suggesting a link between the measles-mumps-rubella (MMR) vaccine and autism. The paper, largely responsible for sparking present-day fears over vaccinations, has since been retracted, and Wakefield barred from practicing medicine in the United Kingdom. 
  
 McCarthy's association with the anti-vaccine movement is so strong that there is even a website, "The Anti-Vaccine Body Count" (originally titled "The Jenny McCarthy Body Count") charting the number of deaths due to preventable diseases since 2007, when McCarthy first began to speak out on the subject. 
  
 "McCarthy has been a leading and very prominent proponent of the concept that vaccines are somehow causally related to the development of autism in children," said Dr. William Schaffner, chair of the department of preventive medicine at Vanderbilt University. "From the point of view of the scientific and the public health community and clinical family doctors and pediatricians, that concept simply is false." 
  
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 While a willingness to say outlandish things is virtually a prerequisite for co-hosts on "The View," McCarthy's position on the vaccine issue has already made her hiring the subject of fierce criticism. 
  
 Last week, as reports surfaced that McCarthy was in talks with ABC, Slate science writer Phil Plait encouraged readers to contact the network and urge executives not to hire her. A similar letter-writing campaign was initiated by Every Child By Two, a nonprofit founded by former first lady Rosalynn Carter to raise awareness about childhood vaccines. 
  
 McCarthy may be that rare person who can unite forces on both sides of the political spectrum: Last week, both the left-leaning website Salon and the conservative magazine Commentary ran pieces characterizing her as a public health threat. 
  
 While their pleas seem to have fallen on deaf ears at the Disney-owned network, the online backlash against McCarthy was swift and furious Monday. |||||

The View has, apparently, traded one controversial blonde for another. As expected, Jenny McCarthy was officially named as Elisabeth Hasselbeck's replacement on the daytime talk show yesterday; she'll start appearing as co-host Sept. 9. But quite a few people are less than pleased that McCarthy has been given such a huge platform from which to air her well-known belief that childhood vaccines cause autism, the Los Angeles Times reports. One author and critic describes McCarthy as "a homicidal maniac" and the View audience as "impressionable" moms with young kids—a bad combination, in his opinion. Indeed, when McCarthy's hiring was rumored, at least two anti-McCarthy letter-writing campaigns to ABC were organized, and both left- and right-leaning media decried her as a threat to public health. Clearly, the efforts were in vain. After McCarthy was confirmed, Twitter exploded with snark; the Hollywood Reporter has a roundup of reactions.