ok i forgot: radaway in a syringe (unrealistic but fun)

CPR to fix dead heart, bag valve mask to fix dead lungs or a ventilator, adrenaline can help resuscitate the dead heart, uh defibrillator only works on what would be shocked irl

They should make it so that if you transfer the blood from someone with an infection to someone else they also get infected and maybe like have it create diff strains of infection and have it so theyre automatically given immunity to strains they survived(?)