Plant-based expression offers a safe, inexpensive and potentially limitless way to produce therapeutics in a quick and flexible manner. Plants require only simple inorganic nutrients, water, carbon dioxide and sunlight for efficient growth. Virus-like particles (VLPs) are convincing look-alikes of viruses but without carrying infectious genomic material. However, they can still elicit a very potent immune response which makes them ideal vaccine candidates. In this review the different methods of plant expression are described together with the most recent developments in the field of transiently-expressed plant-made VLPs.
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