The Republican learned of his diagnosis while he was already in quarantine after being exposed to the virus.
"I've tested positive for coronavirus. I'll b following my doctors' orders/CDC guidelines & continue to quarantine. I'm feeling good + will keep up on my work for the ppl of Iowa from home. I appreciate everyone's well wishes + prayers &look fwd to resuming my normal schedule soon," Grassley tweeted.
Grassley is the sixth U.S. senator to test positive for the novel coronavirus. Sen. Rand Paul, R-Ky., had the virus in March; Sen. Bill Cassidy, R-La., in August; and Sens. Mike Lee, R-Utah, Thom Tillis, R-N.C., and Ron Johnson, R-Wis., in October. Twenty-one members of the U.S. House of Representatives also have tested positive.
At 87, Grassley is at high risk for experiencing severe complications from COVID-19. People who are 85 or older account for 32.3% of all U.S. COVID-19 deaths, the most of all age groups, according to the U.S. Centers for Disease Control and Prevention.