The Centers for Disease Control and Prevention administered 4,563,260 first doses of Covid-19 vaccines in the United States as of the morning of Jan. 4 and distributed 15,418,500 doses.

The first known U.S. case of a highly infectious coronavirus variant discovered in Britain was detected in Colorado on Dec. 29 as President-elect Joe Biden warned it could take years for most Americans to be vaccinated against Covid-19 at current distribution rates.

Europe launched a mass Covid-19 vaccination drive on Dec. 27 with pensioners and medics lining up to get the first shots to see off a pandemic that has crippled economies and claimed more than 1.7 million lives worldwide.

New York State Health officials are investigating a Brooklyn-based healthcare provider on suspicion it violated state guidelines for distribution of Covid-19 vaccine.

The U.S. Centers for Disease Control and Prevention’s (CDC) Advisory Committee on Immunization Practices voted to recommend the use of Moderna Inc.’s Covid-19 vaccine on people 18 years of age and older.

U.S. distribution of Moderna Inc’s Covid-19 vaccine began on Dec. 19, with more than 3,700 sites due to start receiving and administering shots as soon as Dec. 21, vastly widening the rollout started by Pfizer Inc.

Healthcare workers and others recommended for the first Covid-19 inoculations could start getting shots within 24 hours after the vaccine receives regulatory authorization, the chief adviser for the U.S. government’s Operation Warp Speed program said.

With both Pfizer-BioNTech and Moderna’s Covid-19 vaccines at the U.S. Food and Drug Administration awaiting potential Emergency Use Authorization (EUA), airlines are preparing their cargo operations to ship the vaccines.

Although it’s increasingly likely that one of the Covid-19 vaccines being tested will be approved or receive Emergency Use Authorization (EUA) before the end of 2020, experts are increasingly warning that widespread distribution may take a much longer time.

Clinical-stage biopharmaceutical company Zosano Pharma Corporation announced a partnership with EVERSANA, a leading provider of commercial services to the life science industry, to commercialize and distribute Qtrypta in the United States.