different things help different people. Some do well on neutralization and some do well with selenium and other minerals that are prescribed by their doctor. There are many doctors that are in tune with herbs and understanding how they can help your immune system you just need to find them to help with your medical problem.
You need to detoxifying the home this will help strengthen the immune system from home allergies. make sure that you do not have old dusty carpets which can harbor molds. Make sure to use one hundred percent cotton sheets and pillow cases. Air filters in the furnace need to be changes every couple months. You can buy filters that go in the vents that will keep dust to a minimun.You can try some plants that are great at absorbing pollution. These include the spider plants,Brazilian palms, wide leaf wandering Jews, and marigolds.
Try to use natural room deodorizers with healthier alternatives such as baking soda ,lemon juice, and white vinegar. Boiling peppermint will act as a natural air freshener as well. All this will help you boost your immune system and make you feel better. By taking small steps such as buying herbs and alternative health foods will make you more healthy in the long run.