More than a dozen bacterial species among the hundreds inside the mouth have been linked to a collective 50% increased chance of developing head and neck squamous cell carcinoma (HNSCC), according to a new study out of NYU Langone Health and the Perlmutter Cancer Center. Some of these microbes had previously been shown to contribute to periodontal disease, serious gum infections that can eat away at the jawbone and the soft tissues that surround teeth. Experts have long observed that those wi...