An Ohio doctor who received a flood of threats over a pro-vaccine social media post is standing by her message. In a playful TikTok video, Dr. Nicole Baldwin showed the benefits of vaccines, and said they do not cause autism. But that prompted a barrage of hateful responses. Despite scientific evidence that there's no link between vaccines and autism, a recent poll found 46% of parents are still unsure. Dr. Jon LaPook joins "CBS This Morning" to discuss how doctors can counter misinformation about vaccines.