Immunology

Resident T cells discovered in lymph nodes

The immune system is fast when it comes to fighting viruses, bacteria and other pathogens. But it also has to know when not to attack—for example, harmless substances such as pollen or house dust, which otherwise trigger ...

Oncology & Cancer

Strep molecule illuminates cancer immune therapies

Researchers at Harvard Medical School have discovered that a molecule made by Streptococcus pyogenes—the bacterium that causes strep throat and other infections—could help explain several long-standing medical mysteries, ...

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