WebMD Health News reports promising steps towards a Norovirus vaccine. The vaccine is still in the early stages of development, but safely stimulated immune response in a study with healthy adults. The new vaccine is an injectable vaccine designed to work against two strains of Norovirus. This differs from the nasal vaccine tested last year, which only works against one strain and did not provide sufficient protection against the virus in research trials. These preliminary results of the injectable vaccine study were presented at the annual infectious diseases meeting of the American Society for Microbiology. Next, researchers must show that recipients of the injection have fewer symptoms than those that received the placebo. Additional concerns relate to how long the protection will last and the fact that, like flu, different strains predominate in different years. Currently, good hygiene practices are the best preventive measure against Norovirus.
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