Ключевые слова: application, certificate, certification, control, controller, document, epidemic, escape, flight, health, health care, hold, identification, identity, immune, immunity, immunization, infection, international, journey, leave, leaving, liberty, medicine, pandemic, person, prevent, protection, quarantine, rest, safe, safety, security, show, showing, stay, test, testing, tour, traveling, travelling, trip, vacation, vaccination, vaccine, virus, voyage, way, weekend, woman,