The writer is Andrew Pollard, the Director of the Oxford Vaccine Group, Oxford University. The Oxford vaccine also called the Astra Zeneca Vaccine ( Covishield in India) was developed through the efforts of Oxford Vaccine Group. The return of polio to Britain shows how little one can take for granted- nothing is certain, it happens only when we make it happen with our own patient efforts, our wisdom, foresight, learning from the lessons of the past, and working together.