Attached is the global daily cases, with the first year of the pandemic corrected for ascertainment bias. The ascertainment bias starts at 10x and linearly approaches 1x by Jan 1, 2021. All of 2021 uses a single 1x ascertainment bias. Data is from Worldometer.
It's impossible to point out on this chart where we started masking, lockdowns, vaccination, wherever. It would appear the amplitude of the waves are decreasing, possibly converging on 500k daily cases for infinity. Who knows?
