URL copied Europe's vaccination program is 'unacceptably slow': WHO European nations' immunisation campaigns against COVID-19 are âunacceptably slowâ and risk prolonging the pandemic, a senior World Health Organisation official said Thursday. Dr. Hans Kluge, WHO's regional director for Europe, said vaccines âpresent our best way out of this pandemic,â but noted that to date, only 10% of Europe's population has received one dose and that only 4% have been fully protected with two doses. âAs long as the coverage remains low, we need to apply the same public health and social measures as we have in the past, to compensate for delayed schedules,â Kluge said.