(WKOW) -- As of Sunday in Wisconsin, more than 1 million people have gotten at least one coronavirus shot. Nearly 600,000 Wisconsinites are fully vaccinated, according to the Department of Health Services.
Data from the Centers for Disease Control and Prevention (CDC) show the speed of COVID-19 vaccines being administered across the United States improves every day, which brings the country closer to reaching herd immunity.
Herd immunity means enough people are protected against a disease so that it can't spread anymore. Experts agree 70 to 85 percent of the population must be vaccinated to slow the spread of the virus, a range Dr. Anthony Fauci, the White House Chief Medical officer, has cited.
A CNN analysis of CDC data explains the US could reach herd immunity by this summer. According to CDC data, about two million doses of the vaccine are administered a day. About 70 percent of Americans could be fully vaccinated by the end of July and 85 percent by mid-September.