Is that a fact or were the people being infected already unable to .... perform? I suspect they lacked the confidence and overall mentality to be sexually effective from the start.
Just a theory.
Many things can cause ED. In the bodybuilding community it's known as either stim dick, which means too many stimulants like caffeine, DMAA, yohimbine,etc. Or roid dick, which is from prohormones/roidz.
Had a friend on roids who was unable to get it up and another who would go soft while inside his gf.
Then u got stuff like whiskey dick, from drinking too much booze that you cannot get it up.
The article was an interesting read. (Now I'm referring directly to the article)