What we don’t yet know about the Oxford vaccine

We have become used to Mondays bringing good news on the vaccine front. But the publication of interim results from the Astra Zeneca/Oxford University vaccine – AZD1222 – will certainly please the UK government. Not merely because this is the home-grown option and we have already ordered 100m shots, but because, shot for shot, it is considerably cheaper to buy and administer than the other vaccine candidates. The vaccine itself is less than a fifth of the price of the Pfizer vaccine. Moreover, it does not need storing and transporting at minus 70 Celsius – it can be kept at ordinary fridge temperatures (2 to 8 Celsius), greatly facilitating any