HARRISBURG (AP) – One of PA‘s U.S. senators says an antibody test indicated he probably had COVID-19 when he became ill earlier this year. Democrat Sen. Bob Casey said a test result came back earlier last week that showed elevated levels of the antibodies. Casey says he had a low-grade fever and mild flu-like symptoms, leading him to isolate at home for two weeks. He says the fever went away by mid-April and he wasn’t tested at that time. An aide said that Casey donated plasma to help victims of the coronavirus.