Ключевые слова: anatomy, awareness, bacteria, biology, breath, care, concept, contagious, cure, danger, diagnosis, disease, epidemic, flu, health, healthcare, human, illness, illustration, immune system, infected, infection, influenza, lung, lungs, medical, medical test, medicine, organ, outbreak, pandemic, patient, pneumonia, prevention, pulmonary, respiration, respiratory, sick, symptoms, treatment, vaccination, virus,