What if vaccines can't end the pandemic?

New data from Israel shows that the Delta variant is getting through the protection offered by double jabs, even though the vaccines do lessen symptoms. With this and cases rising in the UK again, could it be that vaccines can never offer us the highly effective protection once hoped? Perhaps natural immunity is the strongest of all, as one study (yet to be peer-reviewed) showed this week. Isabel Hardman talks to Fraser Nelson and Kate Andrews.