Half of all adults in the U.S. have received at least one vaccine shot for the coronavirus disease 2019 (Covid-19), it was announced Sunday, marking another milestone in the nation’s largest-ever vaccination campaign but leaving more work to do to convince skeptical Americans to roll up their sleeves.

Almost 130 million people 18 or older have received at least one dose of a vaccine, or 50.4 percent of the total adult population, the Centers for Disease Control and Prevention reported. Almost 84 million adults, or about 32.5 percent of the population, have been fully vaccinated.

The U.S. cleared the 50-percent mark just a day after the reported global death toll from Covid-19 topped a staggering 3 million, according to totals compiled by Johns Hopkins University, though the actual number is believed to be significantly higher.

The country’s vaccination rate, at 61.6 doses administered per 100 people, currently falls behind Israel, which leads among countries with at least 5 million people with a rate of 119.2. The U.S. also trails the United Arab Emirates, Chile and the United Kingdom, which is vaccinating at a rate of 62 doses per 100 people, according to Our World in Data, an online research site.

The vaccine campaign offered hope in places like Nashville, Tennessee, where the Music City Center bustled Sunday with vaccine seekers. High demand for appointment-only shots at the convention center has leveled off enough that walk-ins will be welcome starting this week.

Amanda Grimsley, who received her second shot, said she’s ready to see her 96-year-old grandmother, who lives in Alabama and has been nervous about getting the vaccine after having a bad reaction to a flu shot.

“It’s a little emotional. I haven’t been able to see my grandmother in a year and a half almost,” said Grimsley, 35. “And that’s the longest my entire family has ever gone without seeing her. And we’ll be seeing her in mid-May now.”