The World Health Organisation (WHO has said there is no “zero risk” strategy for countries easing international travel restrictions during the Covid-19 pandemic and essential travel for emergencies should remain the priority, Reuters reports.

In a long awaited update to its guidance on travel, the United Nations global health agency said cross-border trips for emergencies, humanitarian work, the transfer of essential personnel and repatriation would constitute essential travel.

“There is no ‘zero risk’ when considering the potential importation or exportation of cases in the context of international travel,” it said in the updated guidance posted on its website.