Deaths from the coronavirus in the U.S. have tumbled to an average of about 600 per day, the lowest level in 10 months.

In more than half the states, the number of lives lost per day has dropped to single digits on average and hit zero on some days.

Kansas reported no new deaths Friday through Monday. Massachusetts recently had a day of no reported deaths.

Dr. Amesh Adalja, an infectious disease specialist at Johns Hopkins University, says vaccinations have been crucial even as the nation struggles to reach herd immunity.

Confirmed infections have fallen to about 38,000 daily on average, the lowest mark since mid-September.

While new cases are still cause for concern, they have plummeted 85% from a daily peak of more than a quarter-million in early January.

The last time deaths were this low was early July. The coronavirus deaths in the U.S. topped out in mid-January at an average of more than 3,400 a day, just a month into the biggest vaccination drive in the nation’s history.

The U.S. has reported 32.7 million cases and more than 582,000 confirmed deaths, the most in the world.