Thats been the only significant hope I've had all the way along really, that low estimates for mild cases are way off the actual reality. Probably wont really get a sense of this till we see how big the pandemic waves are. Or, of course, if these waves somehow dont emerge quite as expected. Even then, mitigation attempts might get the credit for that, even if there is another factor that isnt understood properly. In which case only longer term serology tests will give us a real sense of how many were infected, and even these might be misleading depending on the timing and how long antibodies and immunity actually lasts.