The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax). The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi. The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopic. Lungs also act as a defence against infection and harmful environmental factors, such as dust, smoke and pollen.

Harmful bacteria inside lungs are responsible for infecting lungs;
Turmeric Curcumin | Omega-3 | Green Tea | Fruits & Vegetables | Black Pepper | Garlic

For More Detail about 

Best Supplements For Lungs

http://articles-on-healthy-life.over-blog.com/2020/07/best-supplements-for-lungs.html