Technology in needles must have come along way in the last 50 years. I remember getting vaccinated in grade school and it freakin hurt. I mean there was an audible pop when the nurse shoved that 1/2” pipe in your arm. Maybe my skin was thicker then I don’t know. When I went for the covid shot she said roll up your sleeve I waited then she your done, nothing no pop, no pinch, no pain was amazed