Recent studies have highlighted a connection between cigarette smoke and disruptions in the composition of the oropharyngeal microbiota. However, this relationship remains poorly understood. The oropharynx consists of the soft palate, the sides and back walls of the throat, the tonsils, and the back of the tongue.
The new strains include viruses that have been passed by humans to pigs, as well as some with genes originating from as far as North America, said researchers
