Ключевые слова: air, antivirus mask, around the world, chinese virus, concept, covid 19, cure, death, device, disaster, disease, disposable, doctor, emergency, filter mask, girl, green, group, health care, help, hospital, intensive care, lung disease, mask, medical, medicine, nations, nurse, pandemic, patient, pharmaceutical, protection, quarantine, sanitary emergency, sars covid 2, science, social alarm, social distance, surgical mask, vaccine,