She bumped into an old woman with a shovel in one hand and a bucket in the other – the ‘pure’ collector, harvesting the dog shit to sell in the Southwark tanneries.

Beyond lack of access to prevention and treatment, entomologic factors such as predominance of outdoor biting vectors may be related to the observed elevated malaria prevalence in school-age children and adults.

He has already made up his mind, and it's a lost cause to try to change it.

Suppose the President were to say (copying some language used once before) that, before the end of this decade, we shall unpollute the Great Lakes.