I’ve paid very little attention but haven’t we known this for at least 4 months? Both the effectiveness of “indoor only” measures and the lack of spikes after B

I’ve paid very little attention but haven’t we known this for at least 4 months? Both the effectiveness of “indoor only” measures and the lack of spikes after BLM protests told us this. We also know it’s airborne, worse if you’re old, obese or diabetic (which effects the immune system so no surprise there). There seems to be a huge amount of effort and attention being put into covid research to reprove things we already knew. Is science always like this?