Coronavirus vaccines could be offered as nasal sprays and tablets – potentially offering “large advantages”.The Oxford University and AstraZeneca jab has already been given to millions of Brits across the UK.However, scientists may replace the needles with “second generation formulations”.Professor Sarah Gilbert, professor of vaccinology at the University of Oxford, discussed the research as she was quizzed by MPs on the Science and Technology Committee.She said: “We are also thinking about second generation formulations of the vaccine."As you know all the vaccines have been given at the moment as intramuscular injections, and that is not necessarily the best way to provide protection against a respiratory virus infection, where we want the.