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What they are 

They’re pharmaceutical drugs manufactured in living cells or microorganisms — think bacteria, yeast, cell lines. By definition, that makes them more complicated and more difficult to produce than small-molecule drugs such as aspirin. Examples of biologics: monoclonal antibodies, interleukin-based chemotherapies, and pretty much any immunotherapy. (Biologics are so special that even their “generics” get a different name — biosimilars. More on those here.)  

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