Background
Determinants of cross-national differences in the prevalence of mental illness are poorly understood.
Aims
To test whether national post-traumatic stress disorder (PTSD) rates can be explained by (a) rates of exposure to trauma and (b) countries' overall cultural and socioeconomic vulnerability to adversity.
Method

This field report summarises the experience and lessons learnt by the author, who was deployed as an International Federation of Red Cross and Red Crescent Societies psychosocial delegate to Liberia for the Ebola Virus Disease outbreak in July and August 2014. Psychosocial issues encountered in the field, including fear in local communities and among aid workers, the spreading of rumours, heath measures interfering with traditional rituals and stigmatisation are discussed in detail. Also included are suggestions for dealing with these issues and actions taken during the mission.

The mental health needs of people affected by emergencies are significant, but often overlooked by health-care providers. The world is facing an unprecedented number of humanitarian emergencies arising from conflict and disasters. In 2014, nearly 60 million people were forcibly displaced due to conflict, the highest number on record. Climatic and geological hazards continue to take their toll, as seen recently following the devastating earthquake in Nepal, cyclone in Vanuatu and flooding in China, Malawi and Myanmar.

Background: Working in humanitarian crisis situations is dangerous. National humanitarian staff in particular face the risk of primary and secondary trauma exposure which can lead to mental health problems. Despite this, research on the mental health of national staff is scarce, and a systematic analysis of up-to-date findings has not been undertaken yet.