His boss fell sick first, with aching pains and a high temperature. Then, some of his colleagues began showing similar symptoms. By the time Rajkumar Adhikari, 35, grew feverish and started vomiting, he learned that the sickness had a name: dengue. Adhikari, a technician at a company that makes batteries in Nepal’s capital, said he had not heard of dengue before this year, when it struck half of the staff at his office. He felt weak, his nose began to bleed and his joints were so painful it was “hard to bear,” he said from his hospital bed last month. Nepal, a Himalayan nation wedged between India and China, is experiencing an unprecedented outbreak of dengue this year, part of a broader resurgence in the mosquito-borne viral disease that experts say is linked to a changing climate . In Nepal, there have been nearly 11,000 cases […]