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People who have herpes 2 can spread the virus to their sexual partner even if they do not have a clinical outbreak. Most cases of genital herpes are acquired from people without a clinical history of genital herpes! Transmission likely correlates with the activity of viral shedding from the skin or mucosal surface where it resides. Studies on patients who were...

  The role of stem cells in cancer metastasis is addressed. Communication between cancer cells and the tissues where it will eventually spread is discussed. Why cancer cells spread to only certain organs and tissues is addressed.