nprnews_____ = ||| lubuntu at wor2 670N|||Just 12 People Are Behind Most Vaccine Hoaxes On Social Media, Research Shows||| kickerpage = |||no kicker pagenpr for NPRNEWS||| summarynpr = |||The majority of false claims about COVID-19 vaccines on social media trace back to just a handful of influential figures. So why don’t the companies just shut them down?