Ключевые слова: backdrop, background, bio, bio hazard, border, breath, cancelled, closing borders, concept, contamination, control, corona, coronavirus, covid, covid 19, covid19, customs control, customs service, danger, dangerous, dangerous illness, detected, dies, disease, environment, epidemic, europe, healthcare, illness, medical, medical mask, medicine, ncov, pandemic, passengers, protection, quarantine, rejected, respiratory disease, restriction, safe, threat, tourism, transmitted, travel, traveler, vacation, vaccine,