Indoor dining will return to New York City on Valentine’s Day at 25% capacity, New York Gov. Andrew Cuomo said Friday.

Indoor dining was shut down in New York City in December.

On March 15, in-person weddings can resume in New York at 50% capacity, or up to 150 people, he said.

Meanwhile, in hard-hit Los Angeles County, outdoor dining is now allowed to reopen at 50% capacity, but with a restriction: TVs must remain off.

Dr. Jay Butler, deputy director for infectious diseases at the Centers for Disease Control and Prevention, said Friday the U.S. has seen a decline in the last two weeks of new cases and hospitalizations, which is “encouraging." But, he added, "The numbers nationally are still high."

"The pandemic is not yet over yet," Butler told the Infectious Diseases Society of America. "By the time we end our 45 minutes together, roughly 100 more Americans will have died of COVID-19."

Butler stressed that the vaccines are safe and effective and that mild side effects are normal.

"The available data tells us that more than half of people have reported some degree of tiredness and pain at the injection site, although most are able to continue normal daily activities," Butler said. "Many also report symptoms such as headache, muscle pain or chills after getting their shots, particularly in the first couple of days. These data also suggest that it may be more common among younger persons after the second dose, but again, this is expected based on some of the data that were available from the clinical trials."

ABC News’ Sophie Tatum contributed to this report.

AstraZeneca’s vaccine on Friday was recommended for conditional marketing authorization in the European Union for people 18 and older. The vaccine is given as two doses.

This is the third vaccine, following Pfizer and Moderna, to be approved by the European Medicines Agency. The AstraZeneca vaccine now awaits final say from the European Commission.

In another promising development for vaccine science, Johnson & Johnson announced Friday that its COVID-19 vaccine -- a single shot tested against a complex barrage of newly emerged variants of the virus -- is 66% effective at preventing symptomatic disease and 85% effective against preventing severe illness.

The U.S. pharmaceutical giant said the vaccine is also safe to take. Volunteers experienced mild reactions after the shot, with less than 10% experiencing fever, according to a company press release.

The full data package will be made publicly available and will be evaluated by the FDA's advisory committee sometime in mid- to late February.

The Food and Drug Administration has said it will consider a vaccine that's more than 50% effective, and the Johnson & Johnson vaccine exceeds this threshold. An emergency use authorization could be given and people could start receiving shots before the end of February.

ABC News' Sony Salzman contributed to this report.

U.S. President Joe Biden's administration said it has secured commitments from manufacturers to buy another 200 million doses of COVID-19 vaccines to arrive this summer -- 100 million from Pfizer and 100 million from Moderna.

This raises the total to 600 million and ensures the U.S. will eventually have two shots for nearly every American.

"We expect these vaccines to be available in production over the course of the summer," a Biden official said Tuesday.

Buying more doses had always been an option for the U.S. government as part of the prior contracts.

"We will increase overall weekly vaccination distributions of states, tribes and territories from 8.6 million doses to a minimum of 10 million doses starting next week," Biden said Tuesday.

The president also vowed to increase "transparency with states, cities and tribes and local partners when it comes to the vaccine supply."

"From this week forward," he said, "states, tribes and territories will now always have a reliable, three-week forecast with the supply they're going to get."

ABC News’ Anne Flaherty contributed to this report.