3 Min Read SAO PAULO (Reuters) - The issues holding up vaccine supply exports from China to Brazil are due to technical, rather than political obstacles, China’s ambassador said on Tuesday, as delays to Brazil’s vaccine rollout began to grow. FILE PHOTO: China's ambassador to Brazil Yang Wanming attends the seminar "Agriculture and Biotechnology - Brazil and China" in Brasilia, Brazil April 25, 2019.REUTERS/Adriano Machado Some have speculated that China, which for years has been the butt of attacks by Brazil’s far-right President Jair Bolsonaro, may have stalled approving the exports ...