GlaxoSmithKline (GSK) has sued Pfizer and BioNTech for patent infringement in a Delaware district court. GSK alleges its five patents were infringed by four of the defendants’ products, which were all variations of the Comirnaty Covid-19 vaccine. In the suit filed on 25 April, GSK contends its patented inventions laid the foundation for defendants' technical and financial success. It claims defendants “repeatedly touted the