The "behavioural immune system" can drive harsher moral judgement and may even contribute to xenophobia.
An outbreak of Ebola in DR Congo involves a rare species of the virus and is in an area affected by conflict.
Lowri Denman picked up a rare parasite while travelling.
A cemetery at the epicentre of the outbreak is rapidly filling up, however large traditional funerals have been scrapped.
Hull parents of boy with Krabbe Leukodystrophy determined to make his life as positive as possible.
MLD is a rare metabolic disorder that leads to a progressive loss of physical and mental skills.
They are thought to have caught the virus before the outbreak was identified, the Red Cross says.
Those caught up in West Africa's Ebola outbreak a decade ago on how best to tackle the current epidemic.
Ebola was first discovered in what is now the DR Congo in 1976 and the country is now facing its 17th outbreak.
