The powers that be decided that Covid was a virus with a droplet based spread, like the flu, and they silenced domain experts who asserted that Covid was a fully airborne virus, like the measles.
The mitigations that were put in place targeted a droplet based spread (washing hands, wiping down surfaces, putting up sneeze guards, staying six feet apart) and were ineffective against a virus you contract by inhaling it as it floats in the air.
Unfortunately, it took two years for the truth about Covid to be begrudgingly accepted.
> Two years of COVID: The battle to accept airborne transmission
https://www.aljazeera.com/features/2022/3/11/two-years-of-co...