Here's how to control the "uncontrolled" spread:

Have the people control their dicks for literally one week.

One week. Abstain from fucking someone with open lesions and sores for one week, and it's all better. I know it's a positively Herculean task, to just jerk off or have one sole sexual partner who you know is healthy and clean, for ONE WHOLE WEEK, but maybe, just maybe, with a miracle, the OGs can manage it, together! ...But not together-together. Apart-together.