Health and Modern Society
During this century in the western world, infectious diseases (those
which are passed on from one person to the next) have declined dramatically,
but health problems brought about by lack of exercise have increased.
Charles Corbin (an American health expert) refers to these as "hypokinetic
diseases" which he says are due to lack of activity. This can be accounted
for, to some extent by the change from jobs needing physical effort to
more sedentary occupations (e.g. office jobs).
There are a number of reasons why infectious diseases have been brought more under control. Improved hygiene and general cleanliness are among the reasons. For example, hospitals are now much cleaner places than they were 100 years ago.