Where it came from remains unclear, read the 'low confidence' about the conclusion.
Masks and social distancing were all we had to work with. The shutdowns were corporate initiated, and who TF wanted to go to restaurants, fly on planes or take cruises?
The science of the vaxxes beat the junk science of disinfectants, light and horse medicine. And when they became available, predictably, verifiably, Trump voters sickened and died from Covid in greater numbers than did those who got the vaxxes and the boosters.