Is this true of, say, Chinese mining engineers?
If you are in a rural area of southern china, drink your gin and tonics daily.
If you are in a city, particularly a northern city, I wouldn't worry about it.
If you are in a city, particularly a northern city, I wouldn't worry about it.
Eradication of malaria has been a failure because we can't reach the more remote areas where humans live with it. Because there is an animal host (mosquitoes), treating a village with anti-malarials is often a temporary reprieve. There will always be mosquitos and recurrent infections to re-infect the locals after the doctors are gone.