I've already posted before about the link between gum inflammation and alzheimer's and also heart disease and now the latest study posted is showing that having periodontal disease also raises the risk of COPD and Pneumonia. So for those who have infected gums or if your teeth are turning greenish yellow

start brushing and gargle with peroxide or risk alzheimer's and lung diseases according to these studies
Healthy gums may lead to healthy lungs - Physorg.com