ines . ▁The ▁campaign ▁used ▁s oph istic ated ▁Twitter ▁b ots ▁to ▁ampl ify ▁highly ▁polar izing ▁pro - v acc ine ▁and ▁anti - v acc ine ▁messages , ▁containing ▁the ▁has ht ag ▁# V acc inate US , ▁posted ▁by ▁I RA ▁t roll s . ▁ ▁Conf idence ▁in ▁v acc ines ▁var ies ▁over ▁place ▁and ▁time ▁and ▁among ▁different ▁v acc ines . ▁ ▁The ▁London ▁School ▁of ▁H yg iene ▁& ▁Trop ical ▁Medicine ' s ▁V acc ine ▁Conf idence ▁Project ▁in ▁ 2 0 1 6 ▁found ▁that ▁confidence ▁was ▁lower ▁in ▁Europe ▁than ▁in ▁the ▁rest ▁of ▁the ▁world . ▁Ref us al ▁of ▁the ▁M MR ▁v acc ine ▁has ▁increased ▁in ▁ 1 2 ▁European ▁states ▁since ▁ 2 0 1 0 . ▁The ▁project ▁published ▁a ▁report ▁in ▁ 2 0 1 8 ▁assess ing ▁v acc ine ▁hes it ancy ▁among ▁the ▁public ▁in ▁all ▁the ▁ 2 8 ▁EU ▁member ▁states ▁and ▁among ▁general ▁pract ition ers ▁in ▁ten ▁of ▁them . ▁ ▁Young er ▁adult s ▁in ▁the ▁survey ▁had ▁less ▁confidence ▁than ▁older ▁people . ▁ ▁Conf idence ▁had ▁ris en ▁in ▁France , ▁Greece , ▁Italy , ▁and ▁Sloven ia ▁since ▁ 2 0 1 5 ▁but ▁had ▁fallen ▁in ▁the ▁Czech ▁Republic , ▁Finland , ▁Poland , ▁and ▁Sweden . ▁▁ 3 6 % ▁of ▁the ▁GP s ▁survey ed ▁in ▁the ▁Czech ▁Republic ▁and ▁ 2 5 % ▁of ▁those ▁in ▁Slov