"Every single year more than 600,000 people in the US die from cancer. The country has never once shut down. Not a single school has closed. And every year, over 600,000 people, of all ages and all races will continue to die from cancer," Greene wrote on Twitter on Saturday. "Since #COVID19 tracking has started, 780,000+ people have died in 22 mo in the US, but more than 1 million still died of cancer," she said.