As the U.S. continues its push to get more Americans vaccinated, three states have risen to the top as the most vaccinated, with at least two-thirds of their population fully vaccinated against COVID-19.

Vermont, Connecticut, and Massachusetts are at the top of the list when it comes to vaccinating their residents, and as a result, they have had the lowest rate of COVID cases per capita over the past week, according to data from the Centers for Disease Control and Prevention, as reported by CNN.

In Vermont, the highest vaccinated state in the U.S., 78.4% of residents 18 and older are fully vaccinated against COVID-19, while Connecticut and Massachusetts have 78.3% and 77.3% of eligible people fully vaccinated against the virus, respectively, according to the New York Times' COVID vaccine tracker.

Vermont's positive seven-day average is 3.5%, while Connecticut’s is 2.73%, and Massachusetts’ is 2.52%. On Monday, Vermont reported 108 new COVID cases, while Connecticut reported 625, and Massachusetts had 1,726 new cases of the virus.

But other states are lagging when it comes to vaccination rates, which is especially concerning to health officials as the highly contagious Delta variant continues to spread.

West Virginia is well below the national average for vaccinated residents with 47.8% of its adult residents fully vaccinated. Wyoming has 49.5% of its residents fully vaccinated, The New York Times' vaccine tracker indicated. Mississippi, Idaho and North Dakota also fall at the low range for their percentage of the population receiving full vaccination against the virus.

The CDC has reported that over 178.6 million Americans have been fully vaccinated against COVID-19, accounting for 53.8% of the U.S. population.

The U.S. has reported over 40.9 million coronavirus cases and over 660,000 COVID-19 deaths, according to data from Johns Hopkins University.

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COVID shot. AFP / Patrick T. FALLON