The euro rose in opposition to the dollar on Tuesday, supported by optimism over another coronavirus vaccine, while the Chinese yuan hit its highest against the US currency since June 2018.Europe’s shared currency, however, dropped against a widely stronger pound, which gained on media reports that Britain could reach a post-Brexit trade agreement with the European Union by early next week.Drugmaker Moderna became the second US pharmaceutical company in a week to report positive results from trials of a coronavirus vaccine, considered necessary to get rid of the pandemic.Last week, hopeful progress in vaccine testing supported the dollar in rising against the safe-harbour yen and the Swiss franc.