DUSSELDORF, GERMANY—  Drupa  has bowed to the inevitable and cancelled the world's largest printing  trade show  expo planned for 2021, along with  other events including Interpack.  Big name exhibitors  exhibitors have already pulled out such as  HP Heidelberg, Fujifilm, Komori, Xerox, Kodak and Bobst.  Drupa is the biggest trade show hosted at Messe Dusseldorf, occupying all 18 halls, and is the biggest event by far in the global print industry.  Ongoing travel restrictions and uncertainty because of the Covid-19 pandemic had led many in the industry to believe that cancelling the show was the only sensible course of action. Drupa 2021 had been due to run from 20-28 April 2021.