your unimmunized child is at risk for measles in any crowd not just disneyland or disney world. she will likely be fine if you do not allow anyone to touch her in the stroller or play with other children. kids like to touch things so if you allow her to touch benches handles etc. places where other children have touched you need to carefully wash or sanitize her hands. you can also wait for disney world until the recent measles epidemic has abated but as far as i know most of the cases are in california (disneyland) not in florida. i don't know when you are planning this trip but you can always check with the local health authorities to see if there are any restrictions or recommendations at the time.
we are planning to attend disney world on vacation. my granddaughter is only 9 months - what are the risks of measles? . she will be flying and attending disney world one day. is this not advisable?