Explainer: How is the US pharmaceutical patent system being misused?
![Explainer: How is the US pharmaceutical patent system being misused?](https://d2cbg94ubxgsnp.cloudfront.net/pictures/280x188/4/3/7/535437_gettyimages1197407444_422380.jpg)
What are ‘evergreening’ and ‘thicketing’ and what is being done to reform the system and aid competition?
What are ‘evergreening’ and ‘thicketing’ and what is being done to reform the system and aid competition?