A drug does not remain on the WHO list if it does not meet the guidelines, one of which is being the most effective. The listed is updated every 2 years. Just because a drug is only used in fringe cases, does not make said drug worth $75,000 per month, which is what treatment at the new price was costing. The cost was miniscule to produce. All the other stuff you are rambling about are nothing more than excuses for greed.