Just one month after the government scrapped all covid-19 restrictions, masks, social distancing and capacity limits have returned. And U.S. authorities last week warned Americans to stay away.

Vaccine opponents have gleefully pointed to Iceland as proof that the shots are a “failure.” But contrary to online misinformation and conspiratorial social media posts, infectious-disease experts say Iceland’s outbreak actually illustrates how effective the vaccines are at preventing the virus’s most severe impacts.

Many of the country’s recent infections have occurred among vaccinated people, but they’ve been overwhelmingly mild. So even as new cases multiplied, Iceland’s rates of covid-19 hospitalizations and deaths have remained low. Of the 1,300 people currently infected, just 2 percent are in the hospital. The country hasn’t recorded a virus death since late May.