- Alzheimer's affects 5.2 million Americans and millions more who are caregivers
- Symptoms include memory loss, difficulty in performing everyday tasks
- Max Wallack, 17, co-wrote a children's book and founded nonprofit group
(CNN)When Max Wallack was 6, his great-grandmother Gertrude Finkelstein -- Great Grams as he called her -- was diagnosed with Alzheimer's disease. His parents were open with him, explaining in easy-to-understand terms that the illness would have a significant impact on her memory.