The measles vaccine represents a monumental achievement in modern medicine, effectively curtailing childhood mortality and morbidity on a global scale. However, recent trends in measles vaccine uptake present a concerning scenario, with declining rates posing a threat to the progress achieved in eradicating this highly contagious disease. Here, Judith Harford, paediatric nurse practitioner, Adam Practice, Poole, Dorset delves into the pivotal role of the measles vaccine in safeguarding child health, exploring the reasons underlying vaccine hesitancy, including the controversial Lancet article, and discusses the additional impact of the Covid-19 pandemic on vaccine adoption. Drawing on global data from the World Health Organization (WHO) and Global Alliance for Vaccine and Immunisation (GAVI), this piece also assesses the consequences of dwindling measles, mumps, rubella (MMR) vaccine coverage on community well-being and offers strategies to combat vaccine hesitancy.