BBKA Forum

https://www.popsci.com/science/honeybee-vaccine-disease/

Sounds promising, just needs to be fed to the queen. Something many queen breeders could do.
But as AFB is not a major prevalent disease in UK probably overkill, but good news nevertheless.

An interesting possibility - although as you say, Nigel, we have very little of it here in the UK.
It will be good to see the results of some longer term and larger trials.