Medical research scientists are getting closer to creating a universal flu vaccine. This brief article reports the latest progress along with a good description of why achieving this has proved so very difficult. It's worth reading for those that are interested in how our bodies learn to recognise pathogens so that we can avoid repeat infections, whether that's by exposure to the pathogens or via a vaccine containing antigen particles from the pathogen:
Photo: Blue Fairies/Blue Beard Orchid (Pheladenia deformis) with an industrious insect busy raiding the orchid for sustenance. Thanks as usual to Jay for identifying the orchid - he's still working on the wasp? and what it's collecting on its back.