by Marc BURLEIGH / Dave CLARK Agence France Presse BRUSSELS, Belgium (AFP) — The European Union warned Thursday that it will ban drugs firms from exporting coronavirus vaccines to the UK and other countries until they make good on their promised deliveries to the bloc. EU chief Ursula von der Leyen’s stark warning — which could hit UK-based AstraZeneca first — came after a video summit of all 27 EU leaders and stoked fears […]