Coronavirus updates: COVID-19 'most severe' global health emergency ever, WHO says

The novel coronavirus pandemic has now killed more than 649,000 people worldwide.

Over 16 million people across the globe have been diagnosed with COVID-19, the disease caused by the new respiratory virus, according to data compiled by the Center for Systems Science and Engineering at Johns Hopkins University. The actual numbers are believed to be much higher due to testing shortages, many unreported cases and suspicions that some governments are hiding or downplaying the scope of their nations' outbreaks.

The United States has become the worst-affected country, with more than 4.2 million diagnosed cases and at least 146,968 deaths.

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Here is how the news is developing today. All times Eastern. Check back for updates.

12:18 p.m.: Critical care chief at Baltimore hospital dies from COVID-19

Dr. Joseph Costa, the chief of critical care at Baltimore's Mercy Medical Center, died from COVID-19 on Saturday, his family said, according to The Baltimore Sun.

"He dedicated his life and career to caring for the sickest patients," Mercy Medical Center said in a statement. "And when the global pandemic came down upon us, Joe selflessly continued his work on the front lines—deeply committed to serving our patients and our City during this time of great need."

Dr. Costa "was beloved by his patients and their family members—known for his warm and comforting bedside manner as well as his direct and informative communication style," the statement added. "When he counseled our patients and families, he did so with great compassion and empathy. For all the nurses and staff who worked closely with Joe on the Intensive Care Unit, he was like an older brother that all admired and revered."

11:45 a.m.: Gym owners charged for allegedly keeping business open despite court order

Two men who own a Bellmawr, New Jersey, gym were arrested Monday morning after allegedly keeping the gym open despite a judge issuing a contempt order against them on Friday, according to the Camden County Prosecutor's Office.

In between Friday and Monday, "a number of individuals" were seen using Atilis Gym, prosecutors said.

"Police said both owners refused to leave the gym when asked, leading to the charges," prosecutors said.

The men were each charged with obstruction, violation of a disaster control act and fourth-degree contempt, prosecutors said. They were released early Monday.

11:10 a.m.: Florida's daily cases below 9,000 for 1st time in at least 2 weeks

Hard-hit Florida reported 8,892 new coronavirus cases Monday morning -- the first time its daily case count was below 9,000 in at least two weeks, according to data from the state's Department of Health.

People are seen on Lincoln Road in Miami Beach, Fla., July 24, 2020.

A health care worker uses a picture to show a person how to use a nasal swab for a self administered test at the new federally funded COVID-19 testing site at the Miami-Dade County Auditorium on July 23, 2020, in Miami.

Throughout Florida, just 18.82% of ICU beds remained available Monday morning, according to the state's Agency for Healthcare Administration.

Monroe County and Okeechobee County had no ICU beds available, the agency said.

ICU availability will fluctuate throughout the day as hospitals and medical centers provide updates.

10:20 a.m.: Cases have roughly doubled worldwide in last 6 weeks

Coronavirus cases have roughly doubled worldwide in the last six weeks, World Health Organization (WHO) Director-General Dr. Tedros Adhanom Ghebreyesus said Monday.

This is the sixth time a global health emergency has been declared and COVID-19 "is easily the most severe," Tedros said.

In the countries following hand washing, social distancing and mask guidance, cases are going down, Tedros said. In the countries not following those rules, cases are rising, he said.

Tedros said Cambodia, New Zealand, Rwanda, Thailand and Vietnam prevented large-scale outbreaks, while Canada, China, Germany and South Korea brought large outbreaks under control.

Fans in the grandstand watch the Super Rugby Aotearoa match between the Hurricanes and the Highlanders, at Sky Stadium, Wellington, New Zealand, July 12, 2020.

9:37 a.m.: Miami Marlins' home opener canceled due to COVID-19 breakout

The Miami Marlins' home opener -- set for Monday night against the Baltimore Orioles -- has been canceled due to a COVID-19 breakout, ESPN reported.

At least 14 people, including players and coaches, have tested positive in recent days, sources told ESPN.

Jesus Aguilar #24, Brian Anderson #15, Francisco Cervelli #29, and Corey Dickerson #23 of the Miami Marlins react after a three run home run by Anderson against the Philadelphia Phillies at Citizens Bank Park on July 26, 2020, in Philadelphia.

The Marlins remain in Philadelphia where they played the Philadelphia Phillies Sunday night. The Phillies were set to host the New York Yankees Monday night but the game has since been postponed.

The MLB said it is conducting more testing.

"The members of the Marlins’ traveling party are self-quarantining in place while awaiting the outcome of those results," the MLB said.

8:20 a.m.: No live family tributes on Sept. 11 anniversary

This year on Sept. 11, the ceremony marking the anniversary of the terror attacks will not include the annual in-person recitation of names by victims' relatives.

The National September 11 Memorial and Museum informed the families in a letter that, because of the pandemic, the reading of names during the commemoration would be recorded.

Nicholas Haros, who lost his mother Frances in the September 11, 2001 terrorist attacks, reads names at the National September 11 Memorial, Sept. 11, 2019, in New York City.

Families are still welcome on the plaza in lower Manhattan for an event with social distancing and masks.

The ceremony will still mark six moments of silence for when the planes struck the World Trade Center, when the towers fell, when the Pentagon was attacked and when UA93 crashed in a Pennsylvania field.

What to know about coronavirus:

3:51 a.m.: Italy cracks down on mask use

Several businesses in Naples have been fined 1,000 euros after they were deemed responsible "during a commercial transaction" for customers and clients who did not wear a mask in their establishment.

Besides fines, the government can also force businesses to close for a period between five to 30 days if they are found to be not in compliance. France will also introduce fines of 135 euros for people who do not wear a mask in public spaces indoors.

12:56 a.m.: NFL players who attend 'high-risk' events and contract coronavirus face team discipline, lack of pay

NFL players who contract the coronavirus through "high-risk" activity away from team facilities can face team discipline and might be at risk of not being paid, according to the league's new protocol.

FILE - In this Monday, July 29, 2019, file photo, Dallas Cowboys practice at the NFL football team's training camp in Oxnard, Calif. The NFL has informed teams their training camps will open on time. League executive Troy Vincent sent a memo to general managers and head coaches on Saturday, July 18, 2020 informing them rookies are to report by Tuesday, quarterbacks and injured players by Thursday and all other players should arrive by July 28.

A memo sent by the NFLPA to agents this weekend, a copy of which was obtained by ESPN, outlines several rules governing player contracts, opt-out provisions and the contractual consequences of a canceled season.

The memo says that the final language of Friday's agreement between the league and the players will appear in a side letter that is still being negotiated and that the information distributed this weekend represents "a summary of major aspects of the COVID amendments." The basics have been dealt with, and the final section of the memo is devoted to the fact that players will be held responsible for the way they circulate in public while the coronavirus remains present.

Players were told weeks ago on a conference call with NFLPA leadership that they could face discipline, including fines, for conduct detrimental to the team if they are found to have contracted COVID-19 through reckless activity away from the facility. This weekend's memo reinforces that and says that such activity could allow a team to challenge the status of a COVID-19 diagnosis as a football injury.

If such a challenge were to succeed, presumably the team could place the player on the non-football injury list, a move that would allow the team the option of not paying him.

The memo also states: "Clubs/NFL can challenge designation as a football related injury if it can prove that the player contracted COVID-19 through engaging in high risk conduct below. (This issue remains open.)"

"Players are going to have to be careful outside the building," Los Angeles Rams tackle Andrew Whitworth said last week on a conference call after disclosing that he and his entire family got the virus after one of them went to lunch with a friend. "All it takes is one exposure, and it can spread like wildfire."

ABC News' Clark Bentson, Dee Carden, Ben Gittleson, Will Gretsky, Bill Hutchinson, Aaron Katersky, Christine Theodorou, Scott Withers and Erin Zimmerman contributed to this report.

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