Hard evidence, of which there is little, and professional analysis, which we do have, is making it inexorable that the current now pandemic is US-engineered. We believe this. We cannot conclusively prove this.
The US has a long history of playing these games and some of our analysis material is classified, which means that a public or open-sourced analysis would or should have different results. Watch both videos, with the 2nd video more for the public.
This is quality work, reliable from a medical standpoint.