A 2006 review of the medical literature reported a number of beneficial effects for chamomile in in vitro and animal tests, but added more human clinical trials are needed before any firm conclusions can be drawn. Research with animals suggests antispasmodic, anxiolytic, anti-inflammatory and some antimutagenic and cholesterol-lowering effects for chamomile. Chamomile has sped healing time of wounds in animals. It also showed some benefit in an animal model of diabetes. In vitro chamomile has demonstrated moderate antimicrobial and antioxidant properties and significant antiplatelet activity, as well as preliminary results against cancer. Essential oil of chamomile was shown to be a potential antiviral agent against herpes simplex virus type 2 (HSV-2) in vitro. Potential risks include interference with warfarin and infant botulism in very young children.