Nowadays mothers are breastfeeding less, yet many children are allergic to a protein found in cow's milk. Researchers in New Zealand have successfully engineered a cow whose milk contains fewer of these proteins.

"In developed countries, 2-3 percent of infants are allergic to cows' milk proteins in the first year of life," the researchers said in a paper published in the Proceedings of the National Academy of Sciences.

Anower Jabed and colleagues at the New Zealand government-run AgResearch company said their genetically modified cow produced milk with a 96 percent reduction in the protein beta-lactoglobulin (BLG), a component known to cause allergic reactions.

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Photo by conorwithonen