As can be seen from the table,over the past 30 years,health conditions in developing countries have undergone tremendous changes.1960 to 1990,the life expectancy increased from 40 years to 60 years.Meanwhile,with the increase in life expectancy,infant mortality declined.In 1960,200 infants die among 1000 ones.In 1990,the infant mortality rate has dropped to 100/1000.
The great improvement of healthy condition in developing countries,in my opinion,is related to the following factors:First,as time goes by,economy develops rapidly,which makes people have a material basis for keeping healthy.Secondly,people are better educated,more civilized,and aware that good health is the guarantee for success in life and work.Lastly,the community and the government paid more attention to medical facilities,and provided better and more convenient medical services.These are the reasons why the life expectancy increased,and infant mortality declined.