Tanzania’s government is working with U.S. logistics company Zipline to launch what they call the world’s largest drone delivery service for emergency medical supplies. In the first quarter of 2018, Tanzania’s government will begin using drones to make up to 2,000 deliveries per day to more than 1,000 health facilities, Zipline said in a statement Thursday. The service will be crucial in times of unexpected demand or bad weather and for small but critical orders, said Laurean Bwanakunu, director-general of Tanzania’s national medical stores. Since October 2016, Zipline has been operating a similar drone delivery service in Rwanda for emergency...