Both Gram-Positive and Gram-Negative bacteria can secrete outer membrane vesicles (OMVs) in their growth and\nmetabolism process. Originally, OMVs were considered as a by-product of bacterial merisis. However, many scientists\nhave reported the important role of OMVs in many fields recently. In this review, we briefly introduce OMVs biological\nfunctions and then summarize the findings about the OMVs interactions with host cells. At last, we will make an\nexpectation about the prospects of the application of OMVs as vaccines.
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