And when that came out of China in February 2003 it took us 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, and so if they had symptoms brought him in, put him in these isolation rooms so they wouldn't infect anybody else, and it took until June.