there are some other causes why people are experiencing serious medical problems. Firstly, the environment of the modern world polluted very significantly from greenhouse gas emissions and other gasses. Many people, for example, are suffering from allergy because of these gasses. Secondly, foods with a low quality such as fast foods, junk foods and any genetically modified ones are influencing to our health very negatively. Finally, life becoming more stressful due to some recent problems such as traffic gam, traffic accidents and others.
There are other reasons for serious health problems. Firstly, the environment of modern world has been heavily polluted due to the emissions of greenhouse gas and other gasses. Many people, for example, are suffering from allergy because of these gasses. Secondly, unhealty food, such as fast food and GM food, has negative influence on our health. Finally, modern life in big cities is mbecoming more stressful due to current issues such as traffic accidents and so on.
Hope it helps ^_^