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Andrew [12]
2 years ago
10

One reason cancer is so hard to immunize against is that it's not an antigen like bacteria or viruses.

Health
2 answers:
ludmilkaskok [199]2 years ago
8 0
Trueeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Alinara [238K]2 years ago
3 0
True....................
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