what else could happen? and then, of course, comes the pandemic. scientists in china are trying to determine if if a new virus strain is responsible for an pneumonia outbreak in the city of wuhan. [dr. fauci] i was lecturing for years, saying, "every time a new president comes in, we've gotta be careful that there will be an infectious disease outbreak. we don't know of its severity. it could be a pandemic that's devastating, or it could be a curiosity." [lawrence] public health officials have been haunted by the 1918 flu. it was a devastating disease. it's often said between 50 and a hundred million people died. we always knew new pandemics would appear. and to have a virus that we haven't ever seen before, that we have no vaccine for, that we have no treatments for, it could overwhelm our systems. [linzi] the outbreak in wuhan is linked to a large food market, which suggests that the virus may have been passed from animals to people. before the first case even came to the united states, the chinese put on a public database