"The matter of vaccination is one for the individual that has to face it to decide for himself... And our Society cannot afford to be drawn into the affair legally or take the responsibility for the way the case turns out." Watchtower 1952 Dec 15 p.764
https://www.jwfacts.com/watchtower/medical.php#vaccinations
'After consideration of the matter,' (with the Feds breathing down our neck) ...
https://wol.jw.org/en/wol/d/r1/lp-e/1952926?q=vaccinations&p=doc