Some experts say Alzheimer’s disease will soon reach epidemic proportions. More than 5 million people in the United States are living with Alzheimer’s disease now, and this number is expected to rise to 16 million by 2050. Alzheimer’s disease affects not just the people who are diagnosed, but their family and friends, too. With so many people diagnosed with the disease, millions more will be caring for them. Here are some things doctors want you to know about Alzheimer's disease.