Johannesburg, South Africa
Stefano Marani, CEO of Renergen, speaks during the media launch of Renergen's working prototype cold-chain...
Stefano Marani, CEO of Renergen, speaks during the media launch of Renergen's working prototype cold-chain storage called Cryo-Vacc, that can keep COVID-19 vaccines ultra-cold during transportation, in Johannesburg, South Africa, February 15, 2021. REUTERS/Sumaya Hisham