Virulite is the manufacturer of the Virulite CS cold sore device. The First Ever cleared device in history by the FDA for the treatment of cold sores! Effective before and after Blister. Treats cold sores fast - No messy creams Convenient to use - Just three times a day for two days Effective even once the blister has arrived Discrete, reusable, safe and effective Uses breakthrough LED light technology How does Virulite work?Virulite is a new therapeutic technology developed by researchers who found a particular narrow waveband of light effects cold sore healing times. The invisible infra red light in Virulite has been shown to enhance the local immune response to the cold sore infection. If you use Virulite during the tingling phase, the device may even help prevent attack. If your cold sore has already erupted, Virulite will help speed up the healing time. Instructions:Use Virulite as soon as you feel your cold sore symptoms beginning (the tingling phase) and repeat again 12 hours later. Continue to use twice a day for the next 2 days. For more persistent attacks, the treatment can be carried out more frequently without adverse effect. How to Use: 1. Press the power button.2. Place the device over the cold sore.3. Hold in position until you hear the audible beep.4. Device switches off at the end of a 3-minute treatment cycle.