Have you ever wondered why it is that humans get sick in so many different ways? The answer is very complex but also very simple. Humans fall victim to the vast array of germs and viruses residing in every facet to today's world. From the glass of water you just drank to the meal you ate and even the breath that you just inhaled. Dangers are all around us and the human body has a way to fight off many of them. The thing is that science can only battle the ones that they can identify which leaves many undetected until a later time.
It is true that nature will sometimes fight its way into your body to do harm and damage but it is also sometimes the case that it gets blamed for barging in and causing problems when we invite it in. One good example is that if you do not consume enough water regularly and your body ends up dehydrated bad things can happen and your body can be weakened to the point that germs can take advantage of it when they otherwise would not be able to. We must strive to maintain ourselves the right way so that we minimize the chances of sickness.
Right now at any given time there are a ton of harmful chemicals and creatures inside your body doing what they can to cause you harm and take control over your function. Lots of these things can be stopped form entering our body but not all of them can be stopped. The way to stop them from becoming a problem is by making it hard for them to get a good grip over us. The right amount of rest and the ingestion of the right vitamins and minerals is our best weapon to prevent a hostile takeover. True immunity from everything is impossible but gives you a fighting chance to stay healthy.
How many of us really understand what our body needs form us on a daily basis? Not all that many but if you learn what you have to do for your body then you have a much better than average chance of living a long and prosperous life free form sickness and disease. You have nothing guaranteed in writing that you will stay free from sickness but your body will fight to stay alive and the more things that you give it to win the fight the better the odds are of it winning.