Merck's Keytruda drug was shown in a new study to help about 40 percent of advanced melanoma patients stay alive for three more years. Former U.S. president Jimmy Carter used the medication after he was diagnosed with cancer last year.
Merck's Keytruda drug was shown in a new study to help about 40 percent of advanced melanoma patients stay alive for three more years. Former U.S. president Jimmy Carter used the medication after he was diagnosed with cancer last year.