Home Risk Management/Safety COVID-19 Vaccine Shipment Returned after ‘Anomaly’ Causes Storage Temperature to Fall COVID-19 Vaccine Shipment Returned after ‘Anomaly’ Causes Storage Temperature to Falladmin Dec 17, 2020 0 Comments Several thousands of doses of the COVID-19 vaccine had to be returned to Pfizer due to an “anomaly” that caused storage temperatures to plunge during shipment, officials said Wednesday.