The influenza virus causes the flu. It is estimated that each year between 250,000 to 500,000 people worldwide die from influenza infections. This is particularly the case among the elderly, immunocompromised and people with chronic diseases. The most effective method of protection against influenza is vaccination. With his research, Freek Cox has contributed to the search for a vaccine that provides protection against a broad spectrum of viruses. He has investigated the possibilities of a vaccine that can induce high levels of broadly neutralizing antibodies (bnAbs), in combination with a strong T-cel stimulating response component.