How killer cells organize troops in fight against infection
from By Lynn Hetzler
Within days of a viral infection, an army of cytotoxic T cells spreads out to track and kill infected body cells to prevent the further spread of pathogens. Cytotoxic T cells only become active and multiply upon evidence of a pathogen, somewhat like a police dog that springs into action only after it sniffs a piece of the perpetrator's property. But a new study by an international research team explains one important mechanism behind building this army of killer cells.
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