Oxford University researchers think they may have a reached breakthrough in their search for a vaccine for the new coronavirus. The team has discovered that the jab could provide "double protection" against the deadly coronavirus following early-stage human trials, reports local UK media. Some special cells of the immune system may still offer protection against the disease, the scientists said as questions swirl on whether people who have recovered from Covid-19 can get it again. The source, however, cautioned that this does not mean that the vaccine provides long-lasting immunity. The Lancet medical journal has confirmed that data from the early-stage trial will be published by the Oxford team on Monday.