EU parliament member Rob Roos asked a Pfizer representative at a hearing if the mRNA vaccine was tested on preventing transmission at the time of introduction.
Elon Musk | Does X Mark the Spot? Why Do Musk, Xi Jinping & Albert Bourla (CEO of Pfizer) mRNA Under the Skin? "There Are Many Silver Linings of COVID. The Advancement of Synethic RNA Was Accelerated Significantly Because of COVID." - Musk
Pfizer | "We Are Exploring, Why Don't We Just Mutate the Virus Ourselves? So We Could Preemptively Develop New Vaccines." - Jordan Trishton Walker, Pfizer Director of Research & Development Strategic Operations & mRNA Planning