Assertion: immune system's cell | /r/CapableOf | identify virus
Facets:
Source sentences:
text: When immune cells identify viruses and other pathogens, they move in to destroy the invaders and return your body to a state of health.
text: This includes physical barriers like your skin, cilia (tiny, hair-like structures) that line your airways, and specialized cells that recognize and attack foreign substances like viruses and bacteria, she explains.