Hello, My Wife Treated A Man Who Was Bleeding Today

Hello, my wife treated a man who was bleeding today who fell on the street. She used her limited First Aid training to help until the fire dept. Arrived. At some point the man scratched her arm, leaving an abrasion only. With his blood on her she is concerned now about HIV or other diseases. She has used alcohol to clean it thoroughly and covered with a large bandaid . Does she need to worry?.. Thanks, Tim