This is from the well known max Planck institute from Germany (we're I live)
The other studies you can easily find are also from well known institutes.
What research?
For you personal?
Public transport mandated ffp2 masks though at the beginning and in Bavaria I primarily saw them.
But still of everything the mask thing is and was always a no brainer. Even if a good study might say later it did only save a few x people in comparison to the effort I don't mind.
At the beginning there was also a lot of isolation due to overwhelmed hospitals. They were real and still struggling.
The biggest issue in my opinion was that we as a society with so much knowledge and automitsation struggled sooo much with either people working from home or not needing to work.
Can you point me to anywhere on the graph that indicates that they improved the outcome? I believe that they were mandated in Bavaria in mid January 2021, and the rest of the country in April 2021. https://ourworldindata.org/explorers/coronavirus-data-explor...
https://www.cnbc.com/2022/07/26/scientists-identify-likely-c...