Everybody stopped listening to him complaining about the spiderwebs in his room when they first arrived, which led to him being worried about being bitten by a spider in the middle of the night. Because he'd started hanging out with McKay, his unconscious naturally transferred McKay's allergy paranoia to him, creating the Iratus bug biting him on the neck and sucking out his life slowly enough that he could be helped (because he wouldn't want to *actually* die).
His continued association with Rodney led to meeting Radek, which ultimately led to his unconscious turning John into a bug because Radek is Czech and so was Kafka (kinda).
no subject
Everybody stopped listening to him complaining about the spiderwebs in his room when they first arrived, which led to him being worried about being bitten by a spider in the middle of the night. Because he'd started hanging out with McKay, his unconscious naturally transferred McKay's allergy paranoia to him, creating the Iratus bug biting him on the neck and sucking out his life slowly enough that he could be helped (because he wouldn't want to *actually* die).
His continued association with Rodney led to meeting Radek, which ultimately led to his unconscious turning John into a bug because Radek is Czech and so was Kafka (kinda).