Here are five updates on the COVID-19 vaccine over the past week:
Johnson and Johnson is expected to release data on its vaccine in early January, according to a Dec. 22 report from FOX 31.
Moderna's COVID-19 vaccine received emergency use authorization from the FDA Dec. 18, making it the second vaccine approved in the U.S.
The FDA is investigating reports of allergic reactions to the Pfizer-BioNTech COVID-19 vaccine.
Pfizer and Moderna are testing their COVID-19 vaccines against a mutated strain of the coronavirus that first appeared in England.
Hospital pharmacists discovered Dec. 16 that some vials of Pfizer's COVID-19 vaccines that are supposed to hold five doses actually contain six or seven.