A Study to Collect Data to Build Artificial Intelligence Derived Algorithms for Estimating Risk of Iron Deficiency and Anaemia in African Children

Inclusion Criteria: * Children over 6 months of age and under 6 years of age. * Written consent from the legally acceptable parent(s) or representative(s), who are themselves ≥ 18 years of age, to consent to and comply with the terms and conditions of the study. * The parent(s) must be able to understand the content of the study and complete the study questionnaires. * Parents should be comfortable with their child having blood drawn. * The participant must have a haemoglobin level corresponding to a haemoglobin group with open slots for participation. Exclusion Criteria: * Children with a medical condition that, in the opinion of the investigator, would render them unsuitable for enrolment * Children with nail bed obstructions, nail polish, nail discoloration (e.g., leukonychia, melanonychia, bruising, etc.), or scarring of the lips, or lip pigmentation due to thyroid dysfunction (e.g., Peutz-Jeghers syndrome) * Children who are unable to cooperate with study procedures * Employees and/or children/family members or parents of employees of the Danone Global Research \& Innovation Center or Danone affiliates participating sites * Children whose health condition requires emergency care