Immunisation coverage and factors associated with incomplete immunisation in children under two during the COVID-19 pandemic in Sierra Leone. - Wassenaar, Myrte; Fombah, Augustin E.; Chen, Haily; Owusu-Kyei, Kwabena; Williams, Julian; Sunders, Joe-Henry C.; Llach, Mireia; Quinto, Llorenç; Sesay, Tom; Samai, Mohamed; Menéndez, Clara; González, Raquel (BMC Public Health, 2024)