Spanish doctors diagnosed an 11-month old baby with scurvy–vitamin C deficiency. The parents were feeding the child exclusively almond milk and it did not get enough ascorbic acid for adequate collagen production. The issue was the absence of formula or breast milk, not because it was a plant-based beverage. (Dairy milk has no vitamin C.) If fruits had supplemented this baby's diet along with breast milk or formula the baby would have had enough vitamin C.
PositiveTip: Infants, as well as all ages, should never consume only one type of food!