Tanzanian President John Magufuli has died at 61. Tanzania’s vice president said the cause of death was heart failure. Magufuli had not been seen publicly since late February, fueling speculation that he died of a coronavirus infection. Magufuli was a COVID-19 denier who mocked face masks and refused to order public health measures. He raised doubts over vaccines and promoted prayer and herbal remedies for COVID-19 patients. Tanzania hasn’t reported data on its outbreak since April of 2020, but doctors in Dar es Salaam report a surge of patients with respiratory problems may be a sign of a “hidden epidemic.”