More than 167,000 people were vaccinated in the first week of Phase Two of South Africa’s Covid-19 vaccine roll-out. They received just the first dose of the Pfizer vaccine. The roll-out was given a boost over the weekend, with the finding that the Pfizer vaccine can be stored in a refrigerator for a month. Previously, it was estimated that the vaccine would last in a standard fridge for only five days, but new data prove otherwise. The change was approved by the South African Health Products Regulatory Authority after its counterparts in Europe and the US made the same call. Read more about what this means for the roll-out here.