Eighty percent of people phoning a toll-free Ebola help number are prank callers, the head of the Ebola Call Centre in Sierra Leone Reynold Senessie said Tuesday. "Such prank calls are affecting the smooth operation of the centre," said Reynold Senessie while briefing Palo Conteh, head of the National Ebola Response Centre (NERC), who paid an unannounced visit to the call centre. The good news is that "genuine calls are dwindling and response to such calls have been swift,"