Since the first time malware has been able to infect machines needed to keep a person alive or that help during an operation the risk has been there. There is no need for robots to kill people with malware, simply making a machine not function correctly is enough.
While hospitals do their best to never say when a death was caused by malware or a computer virus simply look at how many times people has died due to a machine not working correctly.
Also Amazon new MMO beta is literally killing video cards, can we call it malware?