coronavirus.Anna Cortez says her breast milk turned a terrifying shade of “neon green” – and a breastfeeding expert told her the colour change could have been triggered by the natural antibodies that fight infection and protect the baby.English teacher Anna from Monterrey, Mexico, said that she’s not the only one."A lot of mums have noticed [a change in milk colour] and I've spoken to others in the same situation," she said."It was the same experience as what I had - they got sick and their milk changed colour, and they continued to feed their babies."Anna told the Mirror: "I talked to my daughter’s paediatrician, who is also a lactation consultant, and she said it is common when the mum gets sick, or when the baby gets sick with a cold or.