honoring pfizer vaccines now arriving in the hundreds of thousands of doses each week. millions of people have to be vaccinated. is it a daunting prospect log log gistically? we have the infrastructure and the nature behalf we re trying to do here for south africa makes it daunting. reporter: 30 seconds is all they have. they use a kitchen timer because the fridge will drop in temperature and that minus 70 is critical. the vaccines are so precious, each member of the team is vetted be by the police. the temperature constantly checked. more than 500 vaccine vials in the shipment given an armed escort. it s south africa s best chance of ending its covid-19 crisis. it looks like you got dressed up