Dr. Michael Johnson, director of the Community Health Division for the Southern Nevada Health District, center, flanked by Clark County Commission Chairman Marilyn Kirkpatrick and Clark County Fire Chief John Steinbeck, updates plans to increase contact tracing of COVID-19 cases in Southern Nevada during a news conference at the Clark County Government Center in Las Vegas Tuesday, July 21, 2020. (K.M. Cannon/Las Vegas Review-Journal) @KMCannonPhoto