"For centuries, diseases have plagued mankind, yet when Jan Bekker subjected the Power to his will, people gained a powerful weapon in their fight against disease. Mages study bacteria and viruses, the ways germs spread as well as genetics. Their research is used by medics, who set up hospitals and produce increasingly effective medicines. There are also magical potions capable of healing wounds and internal injuries. Many magic users, such as Marti Sodergren or Visenna, have become healers, traveling the world and using their magic for the good of others.
Autopsies are not universally approved of in criminal investigations. However, experts acknowledge the value of forensically examining a corpse after witnesses have been questioned and experts consulted. An autopsy can provide valuable information on the identity of a victim and on the precise means by which a crime was committed. While performing an autopsy, you should ask detailed questions based on the knowledge you possess. By rejecting impossibilities one by one, you may ultimately find that the truth lies in the most unlikely of hypotheses."
Vesemir gives some of this information during the prologue