Viruses, are they mass murderers trained to kill other living organisms, or can you train them to only target certain enemies? Senior Lecturer in Dr Heather Hendrickson joins comedian and presenter Dai Henwood to discuss the role of viruses with host Dr Michelle Dickinson. Recorded with a live audience, topics including whether or not cold sores are more likely to appear when you are stressed, how antiretroviral treatments are helping patients with HIV and why having more friends could help you to fight off the flu virus!