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The top documents tagged [helpert cells]
Hivaids and world today By Dr Anjum Hashmi MPH
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6.3 Defense against Infectious Disease. Define pathogen A pathogen is any living organism or virus that is capable of causing disease Ex: viruses, bacteria,
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MACROPHAGES The macrophages are large immune cells that devourer or attempt to kill every foreign substance that enters the body. The macrophages do the
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