The immune system consists of organs, cells, tissues, and proteins. Together, these carry out bodily processes that fight off pathogens, which are the viruses, bacteria, and foreign bodies that cause infection or disease.
A strong immune system helps to keep a person healthy. When the immune system comes into contact with a pathogen, it triggers an immune response. The immune system releases antibodies, which attach to antigens on the pathogens and kill them.
Some of the foods include dark chocolate, turmeric, oily fish, sweet potatoes, spinach and ginger
Others are garlic, green tea, kefir, sunflower seeds, almonds, oranges and red bell pepper
Source: medicalnewstoday.