let's talk to amanda mclelland, an emergency health officer for the red cross, joining me on the line from free town in sierra leone. nice to have you with us. the reality of the disease transferred from continent to continent - is it a myth, could it happen, should we be worried? >> obviously with air travel we have cases in three capital cities, so the chances of air travel and people who have had contact with ebola or in incubation moving between continents is real. the preparedness that some countries are putting in place is prudent. the chances of an outbreak in a larger country is remote. given the infrastructure. the biggest risk is spreading to further countries in west africa. >> how concerned are you that the precautions that sierra leone have put in. you say some countries are prude ept. are they doing enough, can it be contained. do they have the infrastructure to deal with the scenario. from what we see, it seems that it hasn't. >> at the present our analogist is that they are out of control. we don't have in place the infrastructure needed to respond to the current outbr