It’s the speed, ease, and availability of influenza testing that makes those statistics possible. We’re likely going to be debating the “real” number of COVID-19 cases for years, simply because it took weeks to get testing started, longer to get it to more than a handful of people a day, and we still haven’t reached a period where everybody who should best tested is being tested. And any estimate is likely to miss a whole of “mild” cases or asymptomatic carriers who gave it to everyone around them without ever knowing they were carrying COVID-19.