He mentions in his essay that it is proven that negative emotions like anger, depression, anxiety, fear are the reason of the weak immune system and which also makes one prone to severe heart diseases. I believe it is so true as I have seen this in my own family. For example, my uncle who always stays in the stress, alone, and have high temper is going through the serious lung problem and he gets really sick here and there because of his loneliness and bad temper. And on the other hand when he is around us and come visit us he stays quite healthy as he engaged more with us in different activities. Also, he has arterial disease hypertension which is the cause of stress due to less interaction, and more stress.
Additionally, Davidson in his essay emphasize the role of positivity and happiness on one’s health. He says that people who have positive attitude and are usually stay happy have advantages like coping from the life threating diseases like cancer. Not only that by staying positive and happy one can strengthen their immune system and prevent severe diseases away. Further, Davidson went ahead and talks about the different flaws in the research that creating the hurdles in proving the positive role of an emotions on health. He talks about the problem in measuring happiness and also the way of access subject’s