But Why don't you just use h2o in its ordinary form? Well, after Googling “hydrogel vaccine,” we found this article from Stanford which explains how hydrogels allow for controlled release from the contents of vaccines, making them safer and more effective. Lead Stories is usually a fact checking website https://tysongcyrk.theisblog.com/26702482/top-hasta-que-precio-llegara-el-dolar-secrets