Recent research found that almost one third of people who inhale high levels of secondhand smoke have same lung damage as people who smoke. This is the first study that has successfully proven that lung damage is possible in people exposed to second hand smoke. Researchers hope that it could have influence on limiting public exposure to secondhand smoke.

Study involved 60 people in research, 45 of them never smoked but were at constant exposure to secondhand smoke. Results showed that about 60% of smokers and 35% of non smokers who were at exposure to second hand smoke had signs of lung damage.

Some of the previous studies examined influence of second hand smoke on lung damage and the way it causes serious problems but until now it was not proven. This study used long time scale, global helium -3 diffusion magnetic resonance imaging and with this technique it is possible to examine lung on molecular level.