The current Ebola 2014 virus is mutating at a similar rate to seasonal flu (Influenza A). This means the current Ebola outbreak has a very high intrinsic rate of viral mutation. The bottom line is that the Ebola virus is changing rapidly, and in the intermediate to long term (3 months to 24 months), Ebola has the potential to evolve.
The implication of the Ebola 2014 mutation rate is this: A single Ebola mutation doesn't necessarily mean the virus will become 'airborne', or that the virus has altered tissue tropism, or that the virus spreads more easily. But a high intrinsic rate of Ebola mutation means that such changes may become possible in the future. If the number of people infected grows into the hundreds of thousands, or even low millions, then the probability of a significant 'constellation' of accumulated Ebola mutations with phenotypic impact becomes more likely. The problem is that accumulated Ebola mutations will scale with the size of the population infected. Conversely, in a small population, such Ebola mutations are not likely to have a significant impact. It's a bit like the virus is buying lottery tickets. The more lottery tickets the Ebola virus 'buys', the more chances it has to 'win'.
Gee, I wonder if our "Ebola Czar" will be able to keep up with this. Maybe he should start attending the Ebola Task Force meetings.
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