People generally believe that happiness can increase health, is conducive to longevity, while unhappy is the direct cause of poor health, but recently researchers have found that after the survey of more than 300 people living conditions, happy or not happy does not mean that the risk of death will become lower or higher, accordingly they pointed out that the disease could lead to unhappiness, But unhappiness itself is not detrimental to health.
The statement 'Some people suffering from serious diseases are optimistic and active in fighting against the disease, and their happiness is relatively high' would challenge the researchers' argument.