@CNN: Russian trolls and Twitter bots amplified online debates about vaccines between 2014 and 2017, a new study suggests https://t.co/bTGVXMiCJf https://t.co/PyPEHdBjl0

@CNN: Russian trolls and Twitter bots amplified online debates about vaccines between 2014 and 2017, a new study suggests https://t.co/bTGVXMiCJf https://t.co/PyPEHdBjl0