Liudmyla Buiun, Head of Tropical and Subtropical Plants Department, shows necrosis on a Phalaenopsis Orchid leaf in a tropical greenhouse, suffering from low temperatures, in a botanical garden after critical energy infrastructure was hit by Russian military attacks in Ukraine, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine December 22, 2022. REUTERS/Gleb Garanich 

Rohingya refugee Toyuba Khatun, 60, recovers from a leg amputation at the Norwegian-Finnish Red Cross field hospital at Kutupalong refugee camp near Cox's Bazar, Bangladesh, November 22, 2017. Khatun's foot got necrosis after getting injured from days of walking to cross the Myanmar-Bangladesh border. Her husband ended up carrying her on his shoulders but by the time she received medical treatment it was too late to save her foot. REUTERS/Susana Vera