by Patrick GALEY Agence France Presse Developing new Covid-19 vaccines will fail to end the pandemic unless all countries receive doses in a fast and fair manner, disease experts warned Saturday. As several nations consider implementing vaccine passports when international travel resumes, the authors of an open letter published in the Lancet medical journal said vaccine stockpiling in wealthier countries would only prolong the global health emergency. They warned that “vaccine nationalism” could leave […]