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Videos using the tag #diseases (x)

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  • 25:09
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    The immune system is the basic defence system of the body that protects us from harmful pathogens and diseases. GERM INFECTED PLACES YOU TOUCH EVERY DAY : https://youtu.be/qjzblwFWDWk The immune system consists of various types of cells and different proteins that kill the harmful invading micro-organisms and protect our body from ...