A Trial Testing a Two-way SMS Platform to Recognize and Prevent Wasting Among HIV-infected and HIV-exposed Uninfected Children in Kenya

Inclusion Criteria (HIV-exposed caregiver-child pairs): * Children aged 6 to 24 months all-inclusive with a MUAC ≥ 12.5cm at the date of recruitment * Children living with HIV or HIV-exposed uninfected children seen as outpatients in early infant detection (EID) or HIV-care clinics at the participating hospitals * The child's caregiver is willing and able to provide informed consent * The child's caregiver can read or write or has someone to help them read or write * The child's caregiver is planning to remain in the catchment area with their child for \> 6 months and willing to return to the health facility for 6-month follow up visits * The child's caregiver has access to a Safaricom phone line and provides a mobile phone number Inclusion Criteria (healthcare workers): \- Healthcare workers working in Homa Bay and Migori County Referral Hospitals, who have contact with pediatric inpatients Exclusion Criteria: * Children with moderate or severe wasting (MUAC \<12.5cm, weight-for-height z-score \<-2, or nutritional edema) at the time of eligibility screening * Children with a congenital condition that limit feeding or syndromes that prevents age-appropriate feeding * Child is enrolled in another study that the PI judges to compromise the aims of this study * Child's caregiver does not pass the second training after being unable to satisfactorily complete the first MUAC training. * Child's caregiver is under the age of 18 years.