
By BY DENISE GRADY from NYT Health https://ift.tt/2T2QvCY

Vaping alters the natural bacteria found in the mouth, leaving you more vulnerable to oral infections and inflammation, a new study reports.
While lung function decreases naturally as people age, researchers linked moderate or significant weight gain to an even sharper decline.
The new findings mesh with the World Health Organization's recent recommendation to only vaccinate adults for tetanus and diphtheria if they didn't have a full series of shots as children.
The trial was funded by the drug's maker, Merck, and involved 253 American and British participants. All had suffered from an unexplained or untreatable cough that had lasted for an average of almost 15 years.