Ключевые слова: air pollution, allergies, antiviral, bacteria, breathing, clinic, copy space, coronavirus, cough, covid19, defense, disease, doctor, epidemic, equipment, face, filter, flu, green, health care, hospital, illness, infection, influenza, mask, medic, medical, medicine, negative space, nurse, outbreak, pandemic, prevention, protect, protection, quarantine, sars, spread, surgeon, surgery, surgical, virus,