you could do your own research - it's not all that difficult - is it?
it would seem that Astra Zeneca is also slowing transmission - but, not as much as the newer technologies in Pfizer ----------------- but, pretty good - just not as good
"To come to that conclusion, University of Oxford researchers swabbed study participants in the U.K. every week and found a 67% reduction in positive swabs among participants who had been vaccinated."
