Timothy Williams is a physiologist and pharmacologist who specialises in the study of inflammation, particularly in diseases of the airways. He discovered eotaxin, a cell signalling protein that draws white blood cells called eosinophils to sites of inflammation and plays a major role in allergic asthma and other diseases.
His research has focused on how inflammation occurs and the role played by different types of white blood cells in this process. After discovering eotaxin, he pioneered research into methods of blocking its action, which holds potential for the development of new asthma treatments. He also researched mechanisms that encourage mast cells to populate body tissues during inflammation and subsequently investigated the chemical signals sent out by these cells.