Pfizer did not know whether Covid vaccine stopped transmission before rollout, executive admits A Pfizer exec has made a frank admission during a parliamentary hearing https://www.news.com.au/technology/science/human-body/pfizer-did-not-know-whether-covid-vaccine-stopped-transmission-before-rollout-executive-admits/news-story/f307f28f794e173ac017a62784fec414 #COVID #VACCINE 

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