The word, "injection," I believe is causing much of the anti-vax hysteria. People don't want that pin prick. They imagine it's a square needle that hurts like spike driven into their arm and onto a cross. For them, they do not want to wake up on the ground with the whiff of smelling salts. They don't want to have a leather strap in their mouth with two attendants holding them by each arm while that spike is heading
DEEP into their arm.
"OUCH!!!"
After the shot . . .
"There's nothing to it!!!"