The spread of Covid-19 is playing havoc with global supply chains and is affecting everything from copper to foodstuffs, with some countries reporting shortages of containers. South Africa, which instituted a lockdown last week, is limiting the movement of people, but is seeking to keep products moving, especially essential goods such as food and medicines. This photo shows cargo ship Kokura sailing into the Port of Rotterdam in Netherlands on March 24. Photograph: Yuriko Nakao for Bloomberg