AEFI	Adverse Events Following Immunization
AI	Artificial Intelligence
AMP Afrique	Agence Africaine de Médecine Préventive/African Preventive Medicine Agency
BCU	Big Catch-Up
DHIS2	District Health Information Software 2
DTP	Diphtheria–Tetanus–Pertussis
DTP-HepB-Hib-IPV	Diphtheria–Tetanus–Pertussis–Hepatitis B–Haemophilus influenzae type b–Inactivated Poliovirus Vaccine
eBASE	Effective Basic Services Africa
EPI	Expanded Programme on Immunization
Gavi	Gavi, the Vaccine Alliance
GCEI	Groupe Consultatif d’Experts en Immunisation/National Immunization Advisory Structure (Mauritania context)
HeVAC	Hexavalent Vaccine (Switch) Assessment Consortium
HepB	Hepatitis B
Hib	Haemophilus influenzae type b
ICC	Inter-agency Coordination Committee
IPV	Inactivated Poliovirus Vaccine
MEL	Monitoring, Evaluation, and Learning
MOH	Ministry of Health
NITAG	National Immunization Technical Advisory Group
OPTIVAC	Optimizing Vaccine Product Choices for Low- and Middle-Income Countries
PIE	Post-Introduction Evaluation
Q1	First Quarter
Q2	Second Quarter
RR2	Second Dose of Measles–Rubella Vaccine
SAGE	Strategic Advisory Group of Experts on Immunization
SOMAPED	Société Mauritanienne de Pédiatrie/Mauritanian Pediatric Society
UNICEF	United Nations Children’s Fund
WHO	World Health Organization
WHO AFRO	World Health Organization Regional Office for Africa
WP	Whole-cell Pertussis