Areas of origin of the bean correspond to malarial areas.

"They come here for malaria pills," she said, referring to a standard preventive tablet in high-risk malarial areas like Zimbabwe.

The primary alternative, doxycycline, must be taken every day, beginning a couple of days before the visit and continuing four weeks after leaving the malarial area.

It was suicidal to remain in a malarial area without supplies of quinine.

The region was remote, wild and dangerous and was also in a particularly unhealthy malarial area.

But we're not in a malarial area, are we?

Malaria - the far north is a malarial area so consult your doctor.

There is a year long deferral for those who have visited a malarial area.

I had, in fact, got into the habit of paying little more attention to them than one would to mosquitoes in a known malarial area.

Travel to malarial areas will carry greater risks and is best avoided.