. >>> paediatrician, host of "doctor america youtube show" is with me, along with dr lena wen, baltimore city health commissioner. dr wen, you have the force of law, the authority of government of baltimore, but you would like to win the argument, bringing parents along, rather than order them to vaccinate. how do you win the argument. >> it's about science, evidence, and iltraiting about what's when kids are not operating. in the 1930s, they had an outbreak of measles, and there were thousands stricken ill. many permanently disabled, and many who died as well. and illustrating what happens when people are not vaccinated, and illustrating what happens when people are vaccinated. telling stories, using science is a way to win the hearts and the minds. >> i'm touched that you are concerned about me. i'm listening to you. i've read about mercury, autism and kid who get sick after getting vaccines. i'll choose not to do it. >> i'm a doctor at heart as well. i agree with my colleague that ultimately it is about a doctor, patient relationship and understanding the reasons behind why someone is