150322-N-ZF573-140 ATLANTIC OCEAN (March 22, 2015) Aircraft from Carrier Air Wing 1 fly in formation over the Nimitz-class aircraft carrier USS Theodore Roosevelt (CVN 71) during an airpower demonstration March 22, 2015. Theodore Roosevelt, homeported in Norfolk, is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 2nd Class Chris Brown/Released)
There were 4,800 crew on the ship. Of those, 92 percent were tested, with 550 positive and 3,673 negative as of 11 April. On 12 April it was reported that 585 crew members had tested positive. So far there has been one death (April 13).
This would be an infection rate of around 12% to 15% and a mortality rate of 0.17%, so far.
They probably picked up the virus around 9 March while making a port call in Da Nang, Vietnam. The first sailor tested positive on 22 March, and 3 sailors tested positive by 24 March. On 30 March Captain Brett Crozier sent out the email that got him fired. On 31 March, over 100 sailors had been tested positive.