Well, you know the other Corona viruses that we have that we've had to worry about with SARS, which appeared in 2003 in China, and when that came out of China in February 2003 it took a little while to figure out that these people really aren't that infectious till day five or six of their illness, and then they really crash and burn in many, um, would I, um But what we did was basically by knowing that identify these cases in their contacts quickly.