Corona vaccine pre-orders worldwide top five billion
(WorldNews Pakistan)

ISLAMABAD: Although none of the coronavirus vaccines under development has proved its efficacy yet in clinical trials, at least 5.7 billion doses have been pre-ordered around the world. First shipments of a COVID-19 vaccine created by Western laboratories have often been snapped up by the United States, international media reported. Five vaccines — three Western and two Chinese — are in Phase 3 efficacy trials involving thousands of people. In a surprise announcement, Russian President Vladimir Putin claimed Tuesday that a vaccine dubbed Sputnik V — after the Soviet satellite — conferred “sustainable immunity” against the novel coronavirus. As research laboratories around the world race to...