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.
One of the best ways to stay healthy is by choosing an array of foods to boost your immune system. Eating healthy, antioxidant-rich foods such as fruits and vegetables, whole grains, and lean protein is an important part of maintaining good immune system health to help ward off infection and illness.
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.