Megaman / Rockman

My middle son joined the Marines about a year ago.  6 months ago, he left for boot camp.  He was given a shot but not told what it was for.  It was a "peanut butter shot" which supposedly wrecks a recruit's immune system.  His immune system became compromised, he became sick, then sicker until he had to be admitted to the hospital unit. A long battle back to health was started.  3 months after entering boot camp, he rejoined a platoon to continue his training.