A. Early symptoms of the illness are much like the flu. After a short time (in some cases a day or two), more severe pneumonia-like symptoms may appear. Not all individuals with Legionnaires' disease experience the same symptoms. Some may have only flu-like symptoms, but to others the disease can be fatal.
2) Foods High in Vitamin E. Like vitamin C, vitamin E is a powerful antioxidant. Research suggests maintaining ample levels of vitamin E is crucial for maintaining a healthy immune system, especially among older people. To get your fill of vitamin E, look to these foods: wheat germ oil.
Add foods to your diet that enhance the immune system. These include all fruits and vegetables, which is rich in vitamins, minerals and nutrients in general. Garlic and ginger also increase white cell count and may also help fight opportunist infections that take advantage of a compromised immune system. Foods high in zinc, such as squash seeds and oysters, can also help. Step 2. Take a multivitamin.