There are new algorithms that can recognize even masked faces. For example, Moscow (and presumably other "smart cities") has a vast urban security-camera system

There are new algorithms that can recognize even masked faces. For example, Moscow (and presumably other "smart cities") has a vast urban security-camera system that automatically recognizes people on the basis of one's eyes and gait; this is how the authorities were able to later arrest demonstrators at their homes, even though they had been masked at the unauthorized protests.