https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3786481/
Potential role of periodontal infection in respiratory diseases
Pneumonia is an infection of the pulmonary parenchyma caused by a variety of infectious agents, including bacteria, mycoplasma, fungi, parasites, and viruses.
https://howtocure.com/apple-cider-vinegar-for-bronchitis/
Using Apple Cider Vinegar for Bronchitis
Apple cider vinegar is a powerful bronchodilatory, decongestant, and anti-inflammatory properties that work together for combating against the painful symptoms of bronchitis.