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Credit: CC0 Public Domain COVID-19 could pass into people’s lungs from saliva with the virus moving directly from mouth to bloodstream—particularly if individuals are suffering from gum disease, according to new research. Evidence shows that blood vessels of the lungs, rather than airways, are affected initially in COVID-19 lung disease with high concentrations of the virus in saliva and periodontitis associated with increased risk of death. The researchers propose that dental plaque accumulation and periodontal inflammation further intensify the likelihood of the SARS-CoV-2 virus reaching the lungs and causing more severe cases of the infection. Experts say this discovery could make effective oral healthcare a potentially lifesaving action—recommending that the public take simple, but effective, daily steps to maintain oral hygiene and reduce factors contributing to gum disease, such as the build-up of plaque.

Cape townWestern capeSouth africaUnited statesMashonaland eastUnited kingdomLos angelesGraham lloyd jonesIain chappleBody research instituteUniversity of birminghamJournal of oral medicine dental researchOral medicineSalisbury district hospitalMouth body research instituteProposed oral vascular pulmonary route