In the past 30 years, more than 30 new aetiological agents of
infectious disease have been identified. Some of these are
responsible for entirely novel and life-threatening disorders,
such as AIDS, Ebola fever, hantavirus pulmonary syndrome and
Nipah virus encephalitis. During the same period, some
longstanding infectious diseases (such as tuberculosis) have
became resurgent, as a result of a combination of complacency,
increased travel and social dislocation, and also increasing
drug resistance. This review looks at some of the key unmet
needs in this therapeutic area and discusses strategies to
address them.