Some vaccine doses kept too cold, Pfizer having manufacturing issues, US officials say
Officials are investigating whether storing the vaccines at excessively cold temperatures poses a safety or efficacy risk.
Thu Dec 17 2020
First US shots in COVID-19 vaccine campaign coming Monday, Army general says
Doses of the vaccine from US-based Pfizer and German partner BioNTech will be delivered to 145 locations around the country on Monday.
Sun Dec 13 2020