Discovering a drug, like bevacizumab, and developing it by putting it into use, such as Avastin, is considered something "new" by most of the planet, unless you use the mindset that everything that ever existed and will exist came from the Big Bang. In that case, you are right. There will never be any new... EVER.
"In February 2004, the FDA approved the use of bevacizumab based on a Phase III clinical trial sponsored by Genentech that showed benefit in first-line treatment of metastatic colorectal cancer when the drug was added to standard chemotherapy".
"Bevacizumab is one of many angiogenesis inhibitors that have been developed based on a hypothesis of angiogenesis action published in 1971 by Judah Folkman, M.D., Harvard Medical School, Boston, Mass.