COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the drive to put shots in arms approached another encouraging milestone Monday: 150 million Americans fully vaccinated.

The coronavirus was the third leading cause of death in the U.S. in 2020, behind heart disease and cancer, according to the Centers for Disease Control and Prevention. But now, as the outbreak loosens its grip, it has fallen down the list of the biggest killers.

CDC data suggests that more Americans are dying every day from accidents, chronic lower respiratory diseases, strokes or Alzheimer’s disease than from COVID-19.

FILE - In this June 5, 2021, file photo, two men talk as crowds gather on L Street Beach in the South Boston neighborhood of Boston. COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the number of Americans fully vaccinated has reached about 150 million. (AP PhotoMichael Dwyer, File)

FILE - In this June 5, 2021, file photo, two men talk as crowds gather on L Street Beach in the South Boston neighborhood of Boston. COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the number of Americans fully vaccinated has reached about 150 million. (AP PhotoMichael Dwyer, File)

The U.S. death toll stands at more than 600,000, while the worldwide count is close to 3.9 million, though the real figures in both cases are believed to markedly higher.

About 45% of the U.S. population has been fully vaccinated, according to the CDC. Over 53% of Americans have received at least one dose of vaccine.

New cases are running at about 11,400 a day on average, down from over a quarter-million per day in early January. Average deaths per day are down to about 293, according to Johns Hopkins University, after topping out at over 3,400 in mid-January.

FILE - In this  June 17, 2021, file photo, a sign is displayed at a restaurant in Rolling Meadows, Ill. COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the number of Americans fully vaccinated has reached about 150 million.  (AP PhotoNam Y. Huh, File)

FILE - In this June 17, 2021, file photo, a sign is displayed at a restaurant in Rolling Meadows, Ill. COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the number of Americans fully vaccinated has reached about 150 million. (AP PhotoNam Y. Huh, File)

In New York, which suffered mightily in the spring of 2020, Gov. Andrew Cuomo tweeted on Monday that the state had 10 new deaths. At the height of the outbreak in the state, nearly 800 people a day were dying from the coronavirus.

FILE - In this June 15, 2021, file photo, Silvia Guillen, 19, and her boyfriend Joseph Alvarez, 22, both from El Paso, Texas, share a kiss at Universal Studios in Universal City, Calif. COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the number of Americans fully vaccinated has reached about 150 million. (AP PhotoRingo H.W. Chiu, File)

FILE - In this June 15, 2021, file photo, Silvia Guillen, 19, and her boyfriend Joseph Alvarez, 22, both from El Paso, Texas, share a kiss at Universal Studios in Universal City, Calif. COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the number of Americans fully vaccinated has reached about 150 million. (AP PhotoRingo H.W. Chiu, File)

FILE - In this June 11, 2021, file photo, people cross a street as they make their way toward Chicago's Wrigley Field for a baseball game. COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the number of Americans fully vaccinated has reached about 150 million. (AP PhotoShafkat Anowar, File)

FILE - In this June 11, 2021, file photo, people cross a street as they make their way toward Chicago's Wrigley Field for a baseball game. COVID-19 deaths in the U.S. have dipped below 300 a day for the first time since the early days of the disaster in March 2020, while the number of Americans fully vaccinated has reached about 150 million. (AP PhotoShafkat Anowar, File)