I find the idea of a future without important drugs, such as those used to treat malaria, really worrying.
A key treatment for malaria failed when four people were treated for the disease in the UK, after travelling to different parts of Africa. The infection came back a month after the initial treatment, and the patients needed an alternative drug to get rid of it.
Although only a few people were affected, doctors and scientists are taking notice. This might be a sign that Africa's malarial parasites are becoming resistant to drugs often used to treat the disease.
See how scientists are working to combat malaria drug resistance in our display in the Who Am I? gallery: How is gene editing transforming medicine?