One in 4 adults in the U.S. is already fully vaccinated

The United States reached a milestone in its vaccination efforts on Wednesday, with new data showing that about 25 percent of adults in the country have been fully vaccinated.

Data from the Centers for Disease Control and Prevention also show that 40% of adults and 75% of the elderly received at least one dose.

The country’s vaccination efforts for Covid-19 began in December, after the emergency authorization of a vaccine by the American pharmaceutical company Pfizer and the German company BioNTech. This effort was greatly accelerated with the addition of the Moderna and Johnson & Johnson vaccines.

States like Illinois and California have linked their reopening plans to the success of vaccination efforts, which determine when it is safe to resume large meetings.

Certain states, such as New Mexico, South Dakota and Alaska, have surpassed the national average and vaccinated more than 30% of their adult populations, according to CDC data.

After his election, President Joe Biden promised that 150 million injections would be delivered in his first 100 days. In March, he changed that target to 200 million. Since then, the country has regularly administered 2-3 million injections per day.

The pace of production of the vaccine also increased after the Biden administration announced an agreement in March that the pharmaceutical company Merck would assist Johnson & Johnson in its production. The effort hit an obstacle when a manufacturing error contaminated 15 million doses of the company’s vaccine.

Still, the United States is in the process of producing hundreds of millions of doses of vaccines by summer. Biden announced on Tuesday that by April 19, states should make all adults in the U.S. eligible for a Covid-19 vaccine, anticipating the previous deadline by two weeks.