Our immune system is a very complex system with numerous tissues, cells, chemicals and substances involved. The different defense mechanisms need to be well balanced to be able to respond in a way that protects our bodies. We do not want to boost our immune system in a certain direction from time to time, because a hyperactive or misdirected immune response can cause more harm than it does good, making us more susceptible to other types of infections or disease. What we do want is supporting our immune system so that it is well balanced and works effectively. In this video I talk about four factors that have a big impact on your immune functioning; stress, sleep, exercise and nutrition. For every one of these I give some practical tips on how to make improvements.