Marisa Fotieo, a teacher from Michigan, said her throat began to hurt halfway through the trip on December 19 so she went to the bathroom to perform a rapid Covid test which confirmed she was infected, WABC-TV reported.
Three people, including the gunman, were killed on Friday in a shootout in a New Jersey supermarket, the fourth such incident in the United States in over a month.
Carradine played Kwai Chang Caine in smash hit 1970s TV series Kung Fu, and regained his iconic glory recently when he played titular villain Bill in Quentin Tarantino's Kill Bill movies.