Salmonella Typhi bacteria can invade the intestines and blood and lead to a disease called typhoid fever – a disease that affects around 11 million people each year globally.
Malaria is a life-threatening disease with a big global impact.
Respiratory syncytial virus (RSV) is a very common virus – nearly all children will catch it before they turn 2, and everyone has been infected by it several times before adulthood.
Salmonella is a common type of bacteria that lives in the guts of people and animals. In most cases in the UK, salmonella infections cause non-life-threatening gut symptoms including diarrhoea, vomiting, cramps and fever.
Understanding the causes and spread of disease is crucial to improving human (and animal) health.
Modern-day volunteer infection studies are carefully managed. The aim is to deliberately expose healthy volunteers to infections – they might get sick, but in a safe and manageable way with healthcare support.