AQUATABS are safe, simple, iodine-free water purification tablets that will protect your health from waterborne disease – kills bacteria, viruses and protozoan cysts Giardia and Entomoeba Histolica (Bacteria, Mycobacteria, Fungi, Spores, Waterborne viruses, Influenza Viruses (H5N1 & H1N1) and Human Rotavirus).