|
|
|
|
front |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |11 |12 |13 |14 |15 |16 |17 |18 |19 |20 |21 |22 |23 |24 |25 |26 |27 |28 |29 |30 |review |
 |
For example, this slide shows a negative association between air pollution and
asthma prevalence in Asia
It is unlikely that air pollution is protective, and it is probably just a marker of the level of economic development. Nevertheless, there is little evidence that air pollution is positively associated with asthma prevalence, either between or within populations. On the other hand, it is associated with exacerbations of pre-existing asthma |