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B cells really are a kind of white blood cell that creates antibodies. Antibodies are proteins that tell other immune cells to destroy possibly dangerous foreign substances like viruses or micro organism.وَمَآ اَسْـَٔلُكُمْ عَلَيْهِ مِنْ اَجْرٍ اِنْ اَجْرِيَ اِلَّا عَلٰى رَبِّ الْ