1.2B grant vs a 100M loan, that is an order of magnitude difference. Also note that those are not the only vaccines, some vaccine developments failed, which were also funded. The US has funded through Operation Warpspeed close to $10B in COVID vaccine research in the first bill passed in Congress earlier 2020, not counting the recent budget they passed with billions more, not counting how much NSF and NIH allocated from existing budgets, while also historically (since WW2) funding about 80% of the entire world’s healthcare research, far away from the UK in second place and in recent years China. The CDC just budgeted $8B for vaccine distribution alone.
In comparison world leaders, including the EU, pledged only $8B for both the R&D and the distribution of vaccines when the US went at it alone in May 2020.
Either way, to make my point a bit easier to understand why testing has failed: here is a video that explains, watch before the woke scolds take it down. https://youtu.be/IZ_8b_Ydsv0