A scientist hypothesized that her vaccine would stimulate the immune system to attack melanoma (skin cancer) tumors and reduce their growth. To test the hypothesis, 100 melanoma patients were injected with the vaccine in a saline solution (Group A) and 100 melanoma patients were injected with only the saline solution
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comprehension) A scientist hypothesized that her vaccine would stimulate the immune system to attack melanoma (skin cancer) tumors and reduce their growth. To test the hypothesis, 100 melanoma patients were injected with the vaccine in a saline solution (Group A) and 100 melanoma patients were injected with only the saline solution
An abnormal growth of skin cells is termed skin cancer. It is often caused if the skin is exposed to the sun although it can also occur on the area which is not ordinarily exposed to sunlight. There are three types of skin cancer known as basal cell carcinoma, squamous cell carcinoma and melanoma.
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