COPENHAGEN—Health authorities in Denmark said on Friday that COVID-19 vaccines from AstraZeneca and Johnson & Johnson would remain excluded from the country’s vaccine roll-out following a review of new safety data. “The balance between possible benefit and possible harmful effects is still not favorable, even when we include assumptions in our analyses that benefit the vaccine,” the Danish Health Authority said in a statement. Denmark was the first country to suspend and altogether ditch Johnson & Johnson’s and AstraZeneca’s vaccines in April and May over safety concerns due to their potential link to a very rare but serious form of blood clot. Health authorities said then the benefits of the vaccines did not outweigh the risks, especially since most of the elderly population had already been inoculated and the epidemic was largely under control. The European Union’s drug regulator has found a possible link between the vaccines and an extremely …