You can imagine what backlash the WTS was trying to avoid on vaccinations since many jws still don't realize that the WTS made it a "conscience" matter in the 1950's. That idea still permeated the WTS even just before 2019. You can imagine that some jws were going around telling other jws they couldn't be vaccinated as the WTS said so (without any proof from a publication, wow). Evidently, those people weren't keeping up with the chariot of god (WTS/GB). So the WTS had to get direct and specific to jws not to say it was a WTS teaching not to get vaccinated but their personal choice. There is no personal choice in the WTS, it is their way or "the highway" (in other words you can leave). (Yes, Jehovah’s visible organization is keeping pace with the celestial chariot and its Rider...If you are one of Jehovah’s Witnesses, are you keeping pace with God’s visible organization? Doing so is not simply a matter of attending Christian meetings and spending time in the ministry. Primarily, pace has to do with progress and spiritual growth. It involves having a positive outlook, setting proper priorities, and being up-to-date. If we are keeping pace with Jehovah’s celestial chariot, our lives are consistent with the message we proclaim)