The World Trade Organization will host ministers from across the globe this month with the aim of striking deals on fish and vaccines, testing the world's ability to set trade rules at a time of mounting tensions.

Global trade discord, COVID-19 and the crippling of its dispute settlement mechanism had already weakened the Geneva-based body, which was twice forced to cancel the ministerial conference due to the pandemic.

The normally biennial meeting, last held over four years ago, will now take place after Russia's invasion of Ukraine triggered commodity price hikes and food export bans and China's "COVID zero" policy exacerbates worldwide supply chain difficulties.