The Bill & Melinda Gates Medical Research Institute (Gates MRI) today announced that a Phase 3 clinical trial to assess the efficacy of the M72/AS01E tuberculosis (TB) vaccine candidate is now underway, with first doses given in South Africa, where TB takes a heavy toll. If shown to be well-tolerated and effective, M72/AS01E could potentially become the first vaccine to help prevent pulmonary TB in adolescents and adults, the most common form of the disease, and the first new TB vaccine in over a century.  

Globally, according to the World Health Organization, an estimated 10.6 million people fell ill with TB in 2022 and 1.3 million died — over 3,500 people per day. The disease primarily affects people in low- and middle-income countries, and those at highest risk are often living in poverty, with poor living and working conditions and undernutrition. In South Africa alone, around 280,000 people are diagnosed with TB each year. 

“The launch of this pivotal Phase 3 trial demonstrates our commitment to harnessing the power of medical innovation to fight diseases like TB that are particularly devastating for low- and middle-income countries,” said Emilio A. Emini, Ph.D., CEO of the Gates MRI. “Clinical study of the vaccine will still require years, but our incredible partners in South Africa and elsewhere who have come together for the Phase 3 study share our hope in the vaccine’s potential.”