An employee scans a QR code to verify a COVID-19 status of a visitor at the entrance to the Memorial Museum of Cosmonautics, amid the outbreak of the coronavirus disease, in Moscow, Russia. From July 7, 2021 museums began to introduce QR codes system. According to a decision of city authorities, people can visit a catering establishment or a mass event exceeding 500 people only with a QR code showing they have been vaccinated, had an infection indicating immunity, or have recently tested negative.
