COPENHAGEN, Denmark (AFP) — Progress against the coronavirus pandemic remains “fragile” and international travel should be avoided, the World Health Organization’s Europe director warned on Thursday but stressed that authorized vaccines do work against variants of concern. “Right now, in the face of a continued threat and new uncertainty, we need to continue to exercise caution, and rethink or avoid international travel,” Hans Kluge said, adding that “pockets of increasing transmission” on the continent could […]