or unable to book appointments. now millions of people are being urged to wait to be called for their jab rather than trying to contact the nhs. little wonder that health officials described the uk s vaccine roll out programme as the greatest logistical exercise the health service has faced since the war. dominic hughes, bbc news. let s speak now with martin michaelis, a virologist, and professor of molecular medicine at the university of kent. given that a new omicron variant has got so many mutations, as it definitely clear that the boosters and vaccines we have will protect? unfortunately it is fair to say that at the moment nothing is clear. the only thing that is really clear is that we have a new variant and this has about 15 new mutations and 32 of those are in the s spike protein of