Investigating immune amnesia after measles virus infection in two West African countries: A study protocol - Karine Fouth Tchos; Renée Ridzon; Mory Cherif Haidara; Djeneba Dabitao; Esther Akpa; Daouda Camara; David Vallée; Mariam Coulibaly; Sekou Camara; Jamila Aboulhab; Mahamadou Diakité; Bassirou Diarra; et al. (PLoS ONE, 2025)