The Robert Koch Institute (RKI), Germany’s health authority, reported 782 new infections on Sunday, bringing the nation’s case count to 232,864. The figure is a notable drop from the more than 2,000 infections reported on Saturday, which RKI said was due to returning travelers. The RKI also reported two new deaths, increasing Germany’s death toll from the virus to 9,269 since the pandemic began. Experts in Germany have claimed that not enough people are using the country’s coronavirus tracking app for it to be effective. More than 17 million people have downloaded the app since it was launched in June,...