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flag Pregnancy and breastfeeding may lower breast cancer risk by boosting long-lasting immune cells, a study finds.

flag A new study published in Nature reveals that pregnancy and breastfeeding may reduce breast cancer risk by triggering a long-lasting immune response, with research led by Australian scientists finding that these experiences boost protective CD8+ T-cells in breast tissue. flag These immune cells, which may have evolved to fight infections like mastitis, can persist for decades and are linked to slower growth of aggressive triple-negative breast cancer in both mice and humans. flag Women who breastfed showed higher T-cell density in tumors and better survival rates. flag The findings, based on analysis of over 260 women and mouse models, could lead to new preventive therapies, though researchers stress breastfeeding is a personal choice and not a guaranteed cancer prevention method.

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