Episode Details

When lab mice with dormant breast cancer cells caught flu or COVID-19, they developed aggressive lung tumors—hinting at a dangerous link in humans. Cancer survivors who got COVID-19 in 2020 were far more likely to die from cancer recurrence within a year, and breast cancer patients in remission saw higher rates of metastatic lung tumors after infection. Scientists believe viral infections may reactivate dormant cancer cells by triggering immune proteins like IL-6 or disrupting cellular energy, turning the body’s defense into a cancer accelerator. While not proof that COVID causes cancer return, the data strongly suggests avoiding severe viral infections is crucial for cancer patients.

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