You seen anything re JNJ vaccine and Delta?Early boosters if needed will probably still be the original, but both Pzifer and Moderna have been working on vaccines for the variants. Moderna has one for the beta variant that started trials in February I think. I would guess most effort is now on the delta variant.
I know some people that were part of the original trials. They are getting close to 1 year since their initial vaccine and are a bit antsy about the delta variant.
The clear benefit of the second jab of other vaccines, especially the similar AZ, in the UK has me curious.