"I regret to announce that we have lost our first doctor, Dr. Mohammed Ali, a Tanzanian national, 37-year-old Male," the health minister, Jane Ruth Aceng, tweeted. Moderna refused China request to reveal vaccine technology - FT Moderna Inc has refused to hand over to China the core intellectual property behind the development of its COVID-19 vaccine, leading to a collapse in negotiations on its sale there, the Financial Times reported on Saturday, citing people familiar with the matter.