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8th February 2020
07:00am GMT

Impressive? I know.
Greene, who is the mother of three children, spoke to the Huffington Post about her experiment and admits she is still breastfeeding her 3-year-old.
“I have been on the wrong end of judgment about my breastfeeding choices, and I’m fed up of it," she told the Huffington Post.
Speaking to USA Today on the project above, Rebecca Starck an OB/GYN at the Cleveland Clinic, explains:
"It's phenomenal to recognize this is a natural product...We try to mimic breast milk with formula, but there is no way to recreate what breast milk can provide the infant," Starck said pointing to breast milk's antibacterial characteristics.
As adults, we kind of take it for granted that our bodies are immune to many harmful bacteria. But it is easy to forget that our immune systems as adults have been years in the making. Newborn babies haven't yet built up their own immunity to viruses and bacteria, and rely on so their mother's immunity, which is passed on via breast milk.
This process is known as passive immunity, and the longer babies are breastfed, the longer their passive immunity continues. Other benefits of breast milk that we know of are: protection from infections, reduced risk of diarrhoea and vomiting, sudden infant death syndrome (SIDS), childhood leukaemia, obesity and cardiovascular disease in adulthood.
Note that passive immunity is only temporary, which is why the WHO and medical professionals advise vaccines should be given from about two months old.
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