Earlier this year, Professor Stanley Plotkin, a pioneer of vaccines, revealed that he has two flu jabs. The 87-year-old, from the University of Pennsylvania, has one in early autumn, followed by another in December each year. The reason? The trusted flu jab, it seems, wears off far faster than we think.
British experts agree that Prof Plotkin, a key player in the development of some of today’s lifesaving immunisations, including rubella, may be on to something.