Explanation:
HIV attacks a specific type of immune system cell in the body. It's known as the CD4 helper cell or T cell. When HIV destroys this cell, it becomes harder for the body to fight off other infections. When HIV is left untreated, even a minor infection such as a cold can be much more severe.
M phase is the period in the life of the cell when it is conducting cell division
Electricity is caused by moving particles that have either a negative or postivite charge
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