As new coronavirus cases in the United States rise precipitously after the holidays, health experts are urging states and the federal government to speed up vaccine distribution, which has proved a logistical nightmare.

“In large metro areas such as Boston, Washington, D.C., and Houston, we need to be vaccinating at least 10,000 people every day for the next eight months to stay on target,” vaccine expert Peter Hotez wrote for The Washington Post. “We are not even close to that,” he added.

Here are some significant developments:

Sign up for our coronavirus newsletter | Mapping the spread of the coronavirus: Across the U.S. | Worldwide | Vaccine tracker | Has someone close to you died of covid-19? Share your story with The Washington Post.