Doctors and public health experts often talk about a bullet as the vector, just as a virus is the vector of transmission in infectious diseases. Both leave a path of destruction as they travel. Families are left to bury loved ones, and survivors may live with chronic injuries that reveal the damage even one bullet can do.

(SOURCE) https://www.cnn.com/2022/11/18/health/gabby-giffords-aphasia-essay/index.html