of course when you have the rules agreed you need them to be fair environmental engaining irs don't think it's high enough or tough enough too. they were skeptical about the deal. they are pleased it hasn't gone through. >> thank you andrew thomas speaking to us from maui >>> the world health organisation says an experimental ebola vaccine could be a game changer in the fight against the virus. the w.h.o. said the vaccine has been 100% effective in testing those in close contact with the virus. most recent outbreak in west africa started in guinea spreading to sierra leone and liberia. more than 11,000 died since march of last year. >> this is the head of the programme's unit for doctors without borders in the u.k. the vaccine could eradicate the disease. >> it's a fantastic development. it's a game changer having this tool as part of the kit. to fight the epidemic. to bring it down. the next step is to roll it out. for the trial to be extended. namely in sierra leone and to continue providing the support required to the health care workers, who face this. >> the inquiry into the poisonin