I'm not sure I like the idea of hundreds of micro-needles any better than one larger needle but the fact that this patch does not require refrigeration is huge.
It could make transport and distribution of the vaccine so much simpler, meaning it could reach people in need in developing parts of the world.
Experts say the patch could revolutionise how flu and other vaccines are given, although more clinical tests over the next few years are needed to get the patch system approved for widespread use. Dr Nadine Rouphael, from Emory University, said: "We could envisage vaccination at home, in the workplace or even via mail distribution." The patch can be thrown in the bin after it is used because the microneedles dissolve away. And because it can be safely stored for up to a year without refrigeration, it could prove extremely useful in the developing world. Experts from Public Health England said it might also be good to use in young children, who tend not to like needles, although the UK has already introduced a nasal spray flu vaccine for them.