Roughly 99% of residents ages 12 and up are now at least partially vaccinated in Montgomery County, Maryland, making it one of the most-vaccinated counties in the U.S., according to the Centers for Disease Control.

As of Friday, nearly 84% of the county’s entire population had received at least one dose, and 76% was fully vaccinated, making it the most-fully vaccinated county with more than 800,000 residents in the country. There were 41 confirmed COVID-19 hospitalizations in the jurisdiction between Sept. 29 and Oct. 5, representing roughly three out of 100 inpatient beds.

Close to 83% of the eligible population in neighboring Prince George’s County had received at least one shot. In D.C., the rate is just under 80%. Overall, 71% of D.C.-area residents have gotten at least one shot, and 63% are fully vaccinated. Across the U.S., 65% of all eligible people have gotten one shot, and 56% are fully vaccinated.

“I want to thank the people of Montgomery County for believing the science and doing their part to slow the spread of this vicious virus,” County Executive Marc Elrich said in a statement Monday.

Elrich continues to urge every eligible county resident to get a shot, saying it’s the best defense against the spread of the Delta variant. But the executive recently spoke out against a proposal to mandate vaccinations for county workers. The Democratic official — who is running for reelection in 2022 — enjoys broad support from the county’s public sector unions, some of whom oppose a mandate.

Elrich said legislation from two councilmembers requiring shots for the county’s government workers is “unneeded,” and would “lead to staffing shortages, diminished public safety, additional financial costs to our taxpayers, and time-consuming legal entanglements.”

Close to 80% of Montgomery County government workers report they are completely or partially vaccinated.

This story was updated to remove references to the vaccination rate in Montgomery County, Pennsylvania because of inconsistencies in reporting between the CDC and the state health department.