The peak season for Lassa fever in West Africa is about to begin. The viral haemorrhagic fever has been largely forgotten in the Ebola crisis, and health workers are warning that they may not have the resources to deal

 US President Barack Obama has played down the chance of an Ebola outbreak in the US, after a second nurse became infected caring for a patient.

 A US health chief has said a mistake was "clearly" made by hospital staff treating an Ebola victim in Texas, resulting in one member being infected.

 Liberia has imposed a night-time curfew and has quarantined an area of the capital Monrovia in a bid to halt the deadly Ebola outbreak.