There are multiple trials going on to find what works as treatments - the UK ones are usually under the Recovery brand https://www.recoverytrial.net/ as @maccavennie has experience of.
Here are all the ones ongoing in the US
Coronavirus Treatment Acceleration Program (CTAP)
CTAP will use every available method to move new treatments to patients as quickly as possible
But these trials take time to prove efficacy and safety and even once passed need to be produced in large quantities.
However prevention is better than cure and the boosters do reduce your chances of catching it and therefore your transmission risk. These protections appear wane but don’t go to zero, 35%-45% (and ~70% for Moderna) is still much better than nothing, and protection against hospitalization is robust.
https://assets.publishing.service.g...t_data/file/1043807/technical-briefing-33.pdf page 25
Should there be more focus on reducing risk factors, well a lot of them can’t be changed like being immune compromised from having an organ transplant.
The ones that can, like obesity, are still very difficult. A “get healthy“ campaign might reach some at the margins but given how strong the resistance is to much simpler things to reduce people‘s risk like wearing a high quality mask I doubt it would make a large difference.
