She's still promoting unsubstantiated FUD about vaccinations, she has just switched her focus from autism to "toxins".
http://www.slate.com/blogs/bad...
"Yet as doctors say, dosage makes the poison. The amount of, say, formaldehyde in a typical vaccination is much less than you’d get eating an apple. The same can be shown for the other ingredients claimed to be toxins in vaccines as well. The truth is vaccines contain far too small a dose of any of these things to cause any of the problems McCarthy and other anti-vaxxers claim exist.as doctors say, dosage makes the poison.
Also, botulinum is the single most lethal toxin known to humans. Yet McCarthy has enthusiastically praised injecting this toxin into her face. How can anyone possibly say that and also say vaccines have dangerous levels of toxins in them with a straight face?"