Families medical history (include parents, siblings, and children)?

My mother has severe asthma. My father had melanoma that has been in remission for 7 years now. My father's dad died in his 60's of melanoma. My dad's mom (85 yrs old) has Alzheimer's and is in a nursing home. My mom's mom (82 yrs old) has late onset diabetes and has heart problems. My mom's dad has had several heart attacks is 90 years old. I only have one brother (34 yrs old) and he is as healthy as a horse.