Title: The sick man. Sentence 1: Everyone inside the subway was scared to be near the coughing man. Sentence 2: He was coughing repeatedly and the people around him were scared. Sentence 3: He kept assuring everyone they were just allergies and to not fret. Sentence 4: He starting coughing up blood and the crowd really got scared.
The sick man collapsed and died on the spot, it was anthrax.