From Wikipedia: There were 16,112,566 members of the United States Armed Forces during World War II. There were 291,557 battle deaths, 113,842 other deaths in service (non-theater), and 670,846 non-mortal woundings. According to the Department of Veterans Affairs, around 620,000 American veterans from the war are estimated to still be alive as of 2016.
My neighbor's father is about 96 and a WWII vet. He's a machinist and still working and has been giving me tooling and knowledge about machining. Lucky to have him around. Such a cool guy.