The main aim of this study is to provide longitudinal growth data in infants with moderate-to-severe cow's milk allergy fed an amino acid-based formula with two added human milk oligosaccharides.

Inclusion Criteria:

1. Full term infant (37 weeks ≤ gestation ≤ 42 weeks)
2. 2500g ≤ birth weight ≤ 4500g
3. Having obtained written informed consent form the infant's parents or legally authorized representatives (LAR).
4. Infant aged between 1 and 8 months.
5. Exclusively formula-fed at time of enrolment; or CMPA infant receiving partial breastfeeding and infant's mother having independently elected before enrolment to exclusively formula feed.
6. Infants with physician-diagnosed CMPA as per standard clinical practice:

Exclusion Criteria:

1. Previous treatment with AAF > 72 hours
2. Known underlying medical condition that would impair growth (as per physician's assessment, e.g. unstable congenital heart disease, cystic fibrosis, metabolic disorder, chronic liver disease etc.)
3. Demonstrated chronic malabsorption which is not due to CMPA.
4. Other significant pre-natal and/or serious post-natal disease other than CMPA before enrolment (per investigator's medical decision).
5. Infants whose parents or caregivers who cannot give informed consent or who cannot be expected to comply with study procedures.
6. Treatment with systemic corticosteroids (oral or intravenous) for >72 hours within 4 weeks before enrolment (topical corticosteroids allowed)
7. Infants taking probiotic preparations for > 72 hour within 4 weeks before enrolment
8. Currently participating or having participated in another clinical trial since birth.

Full-term infants 1-8 months of age with symptoms suggestive of moderate-to-severe CMPA who have failed a trial of extensively hydrolyzed formula (EHF) of at least 2 weeks or who require amino acid formula as first line of treatment