In Freetown, Sierra Leone, volunteers and health workers visit crowded housing areas, in an effort to raise awareness about the Ebola epidemic.
These door-to-door talks are the latest step by officials to stem the spread of the disease.
Ebola has now claimed more than 4,500 lives - nearly all in West Africa.
The rising death toll has prompted the World Health Organization to hold a third emergency meeting in Geneva.
Up for discussion - travel rules, screening measures and the launch of large-scale vaccine trials.
SOUNDBITE: Dr Marie-Paule Kieny, WHO Assistant Director General for Health Systems and Innovation, saying (English):
"These trials will incorporate the largest number of volunteers, and will be very important in terms of determining both the safety and the immunogenecity. And these data are absolutely crucial to allow decision-making on what dose-level should go in the efficacy-testing in Africa."
As the spectre of Ebola looms large, t