BRUSSELS—Russian and Chinese media are systematically seeking to sow mistrust in Western COVID-19 vaccines in their latest disinformation campaigns aimed at dividing the West, a European report said on Wednesday. From December to April, the two countries’ state media outlets pushed fake news online in multiple languages sensationalizing vaccine safety concerns, making unfounded links between jabs and deaths in Europe and promoting Russian and Chinese vaccines as superior, the EU study said. The Kremlin and Beijing deny all disinformation allegations by the EU, which produces regular reports and seeks to work with Google, Facebook, Twitter and Microsoft to limit the spread of fake news. Russian and Chinese vaccine diplomacy “follows a zero-sum game logic and is combined with disinformation and manipulation efforts to undermine trust in Western-made vaccines,” said the EU study released by the bloc’s disinformation unit, part of its EEAS foreign policy arm. “Both Russia and China are …