Stating that digital technologies are helping to make tried-and-tested public health tools even more effective, WHO chief Tedros Ghebreyesus during a briefing said, "Aarogya Setu app from India has been downloaded by 15 crore people." "It has helped city public health departments to identify areas where COVID-19 clusters could be anticipated and expand testing in a targeted way," he added.
Tedros Adhanom also warned against deliberately allowing COVID-19 to spread for herd immunity, calling the approach "scientifically and ethically problematic". "It's used for vaccination, in which population can be protected from virus if a threshold of vaccination is reached," he said. "It's achieved by protecting people from virus, not by exposing them to it...It's not an option," he added.