This week you will look at HIV, an infectious disease that emerged in the 1980s and has become one of the leading causes of death in many countries. You will first look at how HIV affects the immune system and causes AIDS and how it spreads from person to person. You will then review the state of the global epidemic and look at current trends in specific countries. There are many interventions that are available to help prevent transmission and to treat persons who are HIV-positive, and you will review the evidence for each. You will review and critique the strategy that has been developed to ‘end AIDS’ by UNAIDS, the UN agency tasked with leading the fight against AIDS.

Malaria is one of the most high-profile infectious diseases and a major cause of death in young children in many parts of the world. You will first learn about the complicated way that malaria spreads from person to person via mosquitoes. This knowledge will help you to make sense of the relationship between climate and the global distribution of malaria, and you will explore this yourself using fine-scale geographic data. You will then look at the available interventions for combatting malaria and review and critique the WHO’s strategy for combating Malaria.

An important theme in infectious disease research is that new outbreaks can occur. You will look at two diseases that have emerged (or re-emerged) recently – Ebola and Zika. For each in turn, you will learn about what the disease is, how it is spread and the story of the most recent outbreaks. You will also learn about the challenges of trying to understand the nature of an epidemic whilst is it starting to spread, and you will examine data from the 2014 West Africa Ebola epidemic yourself. Finally, you will review strategies have been developed for responding to outbreaks and look at some of the development that are underway that should improve our ability to respond in the future.

The infectious disease that probably causes the most death worldwide today than any other is Tuberculosis, an ancient diseases that is posing new challenges in high and low income settings. Study this week begins with a review of how TB spreads and causes diseases and a close look at spread of disease in several different global settings. The mainstay approach has been providing treatment and you will learn how this has been done and how new approaches and seeking to do more. Prevention of TB touches on many aspects of health care and development, as well as pharmaceuticals and vaccine development, and you will learn about all the current avenues of research and implementation. Finally, you will read and critique current international strategies for ending the TB epidemic.