Ключевые слова: app, application, biometric, borders, certificate, contagion, coronavirus, covid, covid19, disease, document, epidemic, flu, health, id, identity, immune, immunisation, immunity, infect, medicine, pandemic, pass, passport, physician, precaution, prevention, proof, protection, safety, security, serum, syringe, technology, travel, ukraine, vacation, vaccination, vaccine, virus, yellow,