Signed, sealed, delivered: Pfizer marks 1st ‘mass air shipment’ of COVID-19 shot amid cold-chain scrutiny November 30, 2020 Auto Bot News 0 Signed, sealed, delivered: Pfizer marks 1st ‘mass air shipment’ of COVID-19 shot amid cold-chain scrutiny fkansteiner Mon, 11/30/2020 – 09:55