What did i do ask the same with adherence to medications we see the sort of behavior typically and if you imagine they have the same behavior then you do get oscillations and that is what we got in 1918, the cycles of the complacency that produced ongoing outbreaks and i think even with the advent of the vaccine in the countries where there is a lot of skepticism and reviews of this trust you can expect the cycles of this sort. This is what happened in chicago. Practically out of the words that only a few invectives but it only takes a few to reignite. So when you pour the susceptible song to those remaining you get outbursts. Okay. The global spread. Lets talk about this and then i will rack up. The incubation period is unfortunate for this. The statistics suggest the average incubation period is like ten days and that is sad news. The basic idea is that joe gets infected in liberia monday, ghost of airport tuesday, has no fever or other symptoms he passes the exit screening, lands in