At one point she was in, but the next she was out. Jenny McCarthy had been scheduled to appear at a breast cancer fundraiser in Ottawa on March 2. She was going to be a huge draw and help raise a lot of money. Then someone read what Jenny said about autism being caused by vaccines and that cancer can be cured by spending time in a hyperbaric chamber. At that point the organization rescinded their invitation to Jenny. I think Jenny would have been a good fundraiser, but I also understand that you don't want a reporter asking Jenny a question about her views at the event because then it could turn into a big mess.
Source:
http://www.crazydaysandnights.net/2013/02/canadian-breast-cancer-fundraiser-says.html