Is there any article/research study that focuses on how much you are less protected if you have the 2 shots but it has been more than 6 months from last shot and one did not take the booster?
Comparing what?
Infection? That’s hard to study and you won’t see such significant differences with Omicron.
Hospitalization/severity for boosted/non-booster, both cohorts after six months? I guess it’s possible to study this, but you’d get the most relevant result from data that will only include Omicron-prevalent data, and it’s too soon to get that for these data points.