Brett Giroir, the coronavirus testing czar, said Wednesday that the United States’ coronavirus testing capacity is at risk of being overwhelmed in some states by a surge in new infections and increased surveillance efforts in nursing homes and jails.

“It is absolutely correct that some labs across the country are reaching or near capacity,” Giroir said. “Recent data from several states indicate rising infections and now an uptick in hospitalizations and death, even as other states and the great majority of counties are maintaining a low infection burden.”