Yes and AZ fumbled the clinical tests (still not approved by the FDA) and production (not "their fault" to be fair, they had little experience in vaccines, and

Yes and AZ fumbled the clinical tests (still not approved by the FDA) and production (not "their fault" to be fair, they had little experience in vaccines, and the viral vector ones are hard to scale up). Pfizer seems to be much more on point on the fabrication and regulatory aspects, it was a much needed partner.