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Immune cells that fight cancer become exhausted within hours of first encountering tumors – new research

A type of T cell called cytotoxic T cells can recognize the mutated proteins on cancer cells and should therefore be able to kill them. However, in most patients, cancer cells grow unchecked despite the presence of T cells.

The current explanation scientists have as to why T cells fail to eliminate cancer cells is because they become “exhausted.” The idea is that T cells initially function well when they first face off against cancer cells, but gradually lose their ability to kill the cancer cells after repeated encounters.

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Vaccination shot vaccine injection child nurse

Child Vaccination Rates, Already Down Because of COVID, Fall Again

Child vaccination rates dipped into dangerous territory during the first year of the COVID-19 pandemic, when schools were shuttered, and most doctors were only seeing emergency patients. But instead of recovering after schools reopened in 2021, those historically low rates worsened. Experts fear that the skepticism of science and distrust of government that flared up during the pandemic are contributing to the decrease.

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