 Social mobilisation is a key health promotion strategy used by Lohs and middle-income countries to promote vaccination demand, with successful examples including Sierra Leone's routine immunisation programme during the Universal Child Immunisation Initiative, India's establishment of a social mobilisation network for polio elimination in high-risk communities, and challenges faced during the 2017-2018 diff-theria outbreak among displaced Rohingyas in Bangladesh. This article was authored by Mohammed F. Jallow, Elizabeth Wilhelm, Neto Abod, and others.