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Dear Dr. Roach: In a recent article, you spoke of small red blood cells. I have large ones. My MCV is 102, with no anemia. What causes this besides alcohol, and is it something to be concerned about? I do not abuse alcohol. Thank you. C.P.

Dear Dr. Roach: In a recent column regarding concussion, you made a statement that 鈥測ou should remember that treatment is almost always better sooner than later.鈥� That raises some concern for me with my present situation.

Dear Dr. Roach: I was wondering what adult vaccines should be given to enhance the immune system, in addition to improving sleep and diet. P.P.

Dear Dr. Roach: My husband will be 82 in July. About three years ago, I became aware of his sudden movements during the night. We were renting in Florida, and the bed was smaller than our bed at home. His body would jerk, sometimes strongly.

Dear Dr. Roach: The senior centre in my community is kept at a temperature that I and many other seniors find too cool for our comfort. After two hours of playing Scrabble or watching a film, we feel chilled to the bone.

Dear Dr. Roach: I just read your column about anxiety and sleep disturbance. I take issue with your advice to go back to the primary doctor.

Dear Dr. Roach: Our local newspaper just ran the obituary of a 59-year-old woman who died from Alzheimer鈥檚 disease. I didn鈥檛 know her, but I鈥檝e known at least two other people with that illness.

Dear Dr. Roach: My husband is 64 years old and recently was complaining of minor abdominal pain that was not going away. There were no other symptoms, such as nausea or vomiting.

Dear Dr. Roach: I am a 55-year-old, healthy man. A couple of months of persistent, more-severe-than-usual sinusitis led me to my primary-care doctor, who referred me to an ENT specialist.

Dear Dr. Roach: I have been diagnosed with chronic lymphocytic leukemia at stage 1, and I am experiencing swelling in the lymph nodes under my arms and in my neck.