The Centers for Disease Control and Prevention reported last week that half of all adults in the U.S. have received at least one dose of a COVID-19 vaccine. The agency said that the largest-ever vaccination campaign still had a long way to go, especially in convincing skeptical Americans to get the shots.

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, according to the health agency. Almost 84 million adults, or about 32.5 percent of the population, have been fully vaccinated.

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

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