Anthony Fauci, MD: One should take Ebola very seriously, because it’s a devastating disease, with a dramatically high level of case fatality, which is extremely unusual in many respects, quite unique among viral diseases. It’s devastating right now a section, a region of Africa, West African countries. There are other emerging and re-emerging infections that are also quite concerning. Probably the one that keeps coming up is because we have very, very profound historical experience and that is with the respiratory spread endemic and pandemic influenza. So if you look at the history of pandemic influenzas. Influenza is a disease that spreads relatively easy by the respiratory route. If you get a new pandemic in which there is no background immunity or very little background immunity in the population of the world and one that is particularly virulent, the devastation of it could be profound. So although Ebola is frightening and at this particular time, it’s infected 4300 people and killed 2300 people, the influenza pandemic of 1918 killed anywhere from 50 to 100 million people.