Do doctors now understand exactly how laughter helps? Do People generally laugh more or less than before? Is there any

Do doctors now understand exactly how laughter helps? - No, they don\'t. (No, doctors don\'t understand exactly how laughter helps.) Do People generally laugh more or less than before? - People generally laugh more than before. Is there any real evidence to suggest laughter? - No, there isn\'t  any real evidence to suggest laughter.