There were periods [in the history of ebola outbreaks] where cases began the decline.
This is a highly complicated, sophisticated operation in one of the most difficult terrains on earth.
This is going to be tough and it's going to be costly to stamp out this outbreak.
Having healthcare workers infected is usually a 'canary in the mine' for potential amplification.
These are make or break issues, there's a lot of complex logistics and social science here.
In any vaccine market, at some point the manufacturers assess whether its a viable market to continue, and they may stop.
It's really the detective work of epidemiology that will make or break the response to this outbreak.
We're really just at the beginning.
The detective work of epidemiology will make or break the response to this outbreak.
This outbreak has features of both, we're really just at the beginning.
It is going to be at least weeks and more likely months before we get this outbreak fully under control.
From the moment that they escaped, the (health) ministry, who and partners have been following very closely every contact.
There are always two epidemics : one of the virus and one of fear.
Overall, the contact tracing has been a huge challenge, particularly in areas hardest to reach.
It's extremely likely the vaccine has had a positive effect.
