At least 1,008,025 Americans had received their first dose of the vaccine as of 9 a.m. Wednesday, according to a tally from the Centers for Disease Control and Prevention.

There have been 9,465,725 doses distributed across the country.

ABC News’ Eric Strauss contributed to this report.

The first New York City EMTs were vaccinated Wednesday morning, with the hopes of inoculating 450 FDNY members per day.

Since the pandemic began -- with New York City as the spring’s epicenter -- 5,700 members of the FDNY have been diagnosed with COVID-19.

On Tuesday, the FDNY lost its 12th employee to COVID-19. EMT Evelyn Ford, 58, leaves behind four children.

ABC News’ Aaron Katersky contributed to this report.

In the wake of new variants of the coronavirus in the United Kingdom, travelers arriving in New York City from the U.K. will be visited by a sheriff’s deputy to confirm they are quarantining, Mayor Bill de Blasio said.

Additionally, all international travelers will receive a city health commissioner’s order to quarantine via certified mail.

Those who are found in violation will face daily $1,000 fines.

“We cannot take chances with anyone who travels,” the mayor said.

ABC News’ Aaron Katersky contributed to this report.

Another COVID-19 variant has been detected in two cases in the United Kingdom, Health Secretary Matt Hancock said.

"Both are contacts of cases who have traveled from South Africa over the past few weeks,” Hancock said.

Hancock said the “new variant is highly concerning because it is yet more transmissible and it appears to have mutated further than the new variant that has been discovered in the U.K."

The health secretary said both cases and close contacts of the cases have been quarantined.

U.K. travel to and from South Africa is suspended, Hancock said.

The coronavirus is constantly mutating, and there are many thousands of lineages of the virus, each with distinct mutations. There's no evidence this new variant is more deadly and there's no evidence it will affect the vaccine.

ABC News' Mike Trew contributed to this report.

Los Angeles officials arrested over 60 people involved in underground parties over the weekend.

In a statement, the Los Angeles County Sheriff’s Department said the parties were considered superspreader events, as they violated COVID-19 health protocols.

Around 10:45 p.m. Saturday, the Los Angeles Police Department responded to an underground party event in Los Angeles and found two people shot. One of the victims was pronounced dead at the scene, according to a statement from the LASD.

Then, at around 12:30 a.m. Sunday, officers responded to another underground party in Compton, where they arrested 67 people: 61 adults and six juveniles. One firearm was recovered.

A third underground party, located in Los Angeles, was shut down by the LAPD after a shooting took place.

"Sheriff Alex Villanueva has made it clear he will seek out and take law enforcement action against all underground party events occurring anywhere within Los Angeles County, who fall under the Health Orders of the County’s Department of Public Health," the LASD said in their statement. "The goal of these enforcement actions is to reduce the spread of COVID-19 and the risk to our vulnerable populations."