dr john hicks practices and blames vaccinations for autism. >> i have a stepson who developed autism after a set of shots. he hit 105 for 5 days and was the last he was connected to what was going on. >> reporter: there's no credible evidence that vaccinations somehow overload a system. the belief persists and dr hicks is sought after by parents who seek his views. >> i figure out what it is the parent want and what they believe, and support them in that. if a parent believes these vaccines will create a problem, they may create a problem. others like nelson decided to turn away toddlers who are not vaccine i think. >> our duty is not only to the patient, but to the community and many patients in the practice who could not be immunized against the measles. supporters say the parents could choose not to vaccinate. >> you have a choice. how far, that choice has consequences if you decide not to vaccinate your child you can do that. you'll have to home skill your child where they are not with other children. >> reporter: if the bill is law, california,s mississippi and west virginia wil

dr. john hicks practices there and blames vaccinations for his son's autism. >> i have a stepson who developed autism after a full set of shots and he hit 105 for five days and that was the last he was really connected to what was going on. >> there is no credible scientific evidence that vaccinations somehow overload a child's immune system, but the belief persists. >> i see my job to figure out what it is the parents really want and what they believe and then support them in that, because if a parent believes these vaccines are going to create a problem they may create a problem. >> other doctors have decided to turn away toddlers who aren't vaccinated. >> our duty was not only to the patient in our office, but it was really to the entire community and to the many patients in our practice who could not be immunized against the measles. >> supporters say parents could still choose to not vaccinate. >> certainly you have a choice still to decide whether to vaccinate your child or not however that choice has consequences. if you don't want to vaccinate your child, you can still do that you'll j

john hicks practices there and blames vaccinations for his autism. >> i have a stepson that developed autism after vaccination for five diseases. he hit 105 for five days. >> the belief piforts persists and dr. hicks is supported by people who support his views. >> what the parents really want and what they believe support them in that. because if a parent believes these vaccines are going to create a problem they may create a problem. >> reporter: but other doctors like nelson branco has decided to turn away children who are not vaccinated. >> our duty was to the entire community and to the many patients in our practice who could not be immunized against the measles. certainly you have a choice still to decide whether to vaccinate your child or not. however, that choice has consequences. if you decide you don't want to vaccinate your child you can still do that, you will have to home school your child so they're not with oat children where they might be able to infect other children. >> if the bill becomes law california and three other states will have the strictest rules in the nation. jennifer london. al jazeera. >> not much else is known about this law, lisa stark is here with more. li