A new study done at Duke University found that ozone exposure in mice at levels approximating unhealthy levels for humans appears to enhance lung injury.
 
“Small amounts of inhaled foreign material can be relatively harmless, since they stimulate an appropriate innate immune response that protects the lungs,” said John Hollingsworth, M.D., pulmonologist and lead author of study whose results appear Oct. 1 in the Journal of Immunology. “However, it appears that ozone causes the innate immune system to overreact, killing key immune system cells, and possibly making the lung more susceptible to subsequent invaders, such as bacteria.”
 
In other words, stay far away from ozone air cleaners. This includes air cleaners that ionize the air (which creates ozone).
 
If you are looking for a high quality air cleaner, there are two kinds that are synergistic.
 
Airfree
 
IQair