Original sentence: 36% of the GPs surveyed in the Czech Republic and 25% of those in Slovakia did not agree that the MMR vaccine was safe.An analysis of tweets from July 2014 through September 2017 revealed an active campaign on Twitter by the Internet Research Agency (IRA), a Russian troll farm accused of interference in the 2016 U.Confidence had risen in France, Greece, Italy, and Slovenia since 2015 but had fallen in the Czech Republic, Finland, Poland, and Sweden.Confidence in the population correlated with confidence among GPs.Confidence in vaccines varies over place and time and among different vaccines.Dubious claims about vaccines against hepatitis B, HPV and other diseases have been propagated based on misuse of data from VAERS.Most of the GPs did not recommend the seasonal influenza vaccine.Parties opposed to the use of vaccines frequently refer to data obtained from the US Vaccine Adverse Event Reporting System (VAERS).Refusal of the MMR vaccine has increased in 12 European states since 2010.The London School of Hygiene & Tropical Medicine's Vaccine Confidence Project in 2016 found that confidence was lower in Europe than in the rest of the world.The campaign used sophisticated Twitter bots to amplify highly polarizing pro-vaccine and anti-vaccine messages, containing the hashtag #VaccinateUS, posted by IRA trolls.The project published a report in 2018 assessing vaccine hesitancy among the public in all the 28 EU member states and among general practitioners in ten of them.This is a database of reports of issues associated with vaccines.When used appropriately VAERS is a useful tool for investigation, but since anyone can make a claim and have it entered into the VAERS, by itself it is not a reliable source of information.Younger adults in the survey had less confidence than older people.elections, to sow discord about the safety of vaccines