SAFRICA-HEALTH-VIRUS-TECHNOLOGY

Specimens of premixed saline solution designed to mimic the a COVID-19 vaccine are seen on the top of a prototype of Cryo-Vacc, an ultra-cold biologic transport unit, in Dunkeld West, Johannesburg, on February 17, 2021. - The unit uses a helium based refrigerating technology, has been created to safely transport COVID-19 vaccines doses (6000 per unit) as well as other vaccines, especially in rural area of the Africa continent as it maintain the temperature inside (8 to -150 C) constant for over three weeks without an external power source. (Photo by LUCA SOLA / AFP) (Photo by LUCA SOLA/AFP via Getty Images)