Yes, there are multiple liberal biased “Fact Checkers”. There function was to provide skewed and false information (propaganda) and responses to their followers to uncomfortable facts. They are in general un.trustworthy
Your article chooses its “experts”, and even so they hedge their claim with the word “likely”
I cited specific irrefutable facts about billing and thus counting of cases (they farm their data from this source for their lazy studies - I will no longer assume that you made the connection to this fact by deduction). These practices MUST lead to overcounting.
If I cite a Brietbart Fact Check article, you will scoff, because as a liberal, you think that your sources are good and others are bad.