Antibiotic resistance
Malaria infections are not caused by bacteria: they are caused by a protozoan parasite injected into the blood by a mosquito. They are normally treated by a combination of two drugs, artemether-lumefantrine. In 2017 four cases occurred in Britain where the drugs have failed. The patients got the disease in Africa. A doctor said "It is an early sign and we need to take it quite seriously as it may be snowballing into something with greater impact".