I know this argument sounds compelling on the surface, but if we follow the logic, China would have somehow had to inoculate 1.5 billion people without the rest of the world finding this out. That is simply not possible. At the least, our intelligence agencies would know this and Trump would have enacted drastic policies, everything short of war. Most likely these areas have seen outbreaks but China being the authoritarian state it is quickly isolates, abducts, and even eliminates those who are most sick.
Was what those Chinese workers sprayed everywhere really disinfectant? If that works, why did no other country do that?