A massive antibody study in England has found that 3.4 million people, or 6 percent of the country’s population, have contracted the coronavirus.

London, with a population of nearly 9 million people, was hit hardest, with 13 percent of residents having coronavirus antibodies. Less than 3 percent of residents in the South West region of England had the same results.

The study found high rates of antibodies among people working in “care homes” (16 percent) and the health care industry (12 percent), while antibody rates for Black people (17 percent) and Asian people (12 percent) were notably higher than those for white people (5 percent.).