Yes, it has.
Look - let's assume the study is correct and COVID19 is ubiquitous and everywhere. Then you wouldn't see flareups or clusters that we are experiencing because it is already everywhere. Everyone should be burning at the same rate - but we are not seeing that. Also, if the virus behaved that way then places like China, S. Korea, and Singapore wouldn't have luck containing the virus through social distancing, quarantining, and testing because it would already have infected such a large portion of their population before it was noticeable. Similarly, the testing and quarantining in Vo, Italy (the first city in Italy to experience a confirmed COVID19 death) would have revealed far more than 3% infection and we would've seen it reemerge if there were really a boatload of false negatives. What that study implies is nothing close to what we are actually experiencing if it were true.