The number of hospitals in your country is insufficient. If possible, try to build one or more hospitals. If you do not have enough doctors, senior doctors or nurses, change the education priorities to produce the staff you need. Health is an important factor in the game and influences the welfare in your country. The health index also contributes to your general score as a president. Extremely low health levels can also cause civil unrest as your population will not accept bad health care if the country can afford better quality.