The yearly flu vaccine is generally recommended for those with chronic illnesses and the elderly. It is very important to pick your parents carefully. Long-lived parents usually have long lived children. Thinness is healthy. You see very few obese people in their 80s or 90s.
Overweight people die at an earlier age than do trim, thin ones.
As hard as it is to do, you should lose weight and become thin. It is a major factor in good health and long life, less breast and colon cancer, less stroke and heart attacks. Diet - Eat well with lots of vegetables, fish, fruit and whole grains such as pasta, vegetarian pizza, rice, couscous and barley. Avoid excessive meat, fatty foods and saturated fats. If you do not get 20-30 grams of fiber a day in your diet, consider the Jackson Fiber Cocktail .