Centers for Disease Control

COVID cases are once again on the rise in the U.S. and Arizona as a new variant of the virus gains dominance.

The Democratic officials sent a letter Wednesday to congressional leaders, saying “it’s time for the federal government to give back to those who sacrificed so much.”

Scientists say widespread testing for the coronavirus disease is vital before public health officials can make decisions about reopening the economy.…

University of Arizona scientists are embarking on a multi-year study of the Yuma region in the wake of last year's E. coli outbreak.The group will be…