Why would he need to allude to anything? Why not write simply and clearly, so that every reader understands what he is getting at?
He said, "ANY injection", which is ridiculous. Blood transfusions save lives every day.
Why do you attempt to give his words legitimate meaning, by concluding that "oh, he must have meant vaccines, not blood", instead of calling them out as purposely unclear and meandering? He then gets defensive, but instead of communicating exactly why I'm off-base, continues to use circular reasoning and sentence structure. The fact you and I are wasting each other's time with this disagreement shows how poorly he communicates his thoughts.
We haven't taken care of this forum for over a decade for it to come to this.