As floods continued to ravage the south of Pakistan last week, health workers have expressed concern about the rise in the number of suspected malaria cases that have been reported.

World Health Organization data show that 3.7 million people have been treated in areas affected by the floods since they began on 29 July. The cases include just over 500 000 of acute diarrhoea (13% of the total number of cases), 520 000 of acute respiratory …