This kit has 16 remedies that have been effective in treating flu symptoms. They are packaged in 1/4 oz (2 dram) vials with a smaller #20 pellet in a poly-pro box with a tight fitting flip lid. The kit is available in a 30C or 200C potency for your preference. We suggest checking the NCH website, the CDC website and others for further information and updates. For reference, we suggest The Homeopathic Treatment of Influenza by Sandra Perko, as well as The Complete Homeopathy Handbook by Miranda Castro, and Homeopathic Medicine at Home by Dr Panos.