If the G.B members, or just 1 or 2, require this treatment, wait for WHOOSH as Noo Lite suddenly flashes forth !
They have precedent for doing this, when it became necessary for International travel by President Knorr and others to have vaccinations, suddenly they were O.K, though forbidden from the time of Rutherford until then.
Isn't the Holy Spirit's "direction" a wonderful thing ?