Influencers come in all shapes and sizes -- some with rare conditions. Apellis Pharmaceuticals, looking to support those with PNH, a rare blood disorder, found those who could speak to others called ‘patient leaders’. They delivered video messages on Facebook and Instagram to those affected and unsure what to do next. The goal: To drive more completed surveys. The campaign increased previous survey efforts by 211%, three times higher than traditional social campaigns at a 14% more efficient cost per qualified completion. Getting better.