been vaccinated in the uk, and a lot of people who were immune, 30 or 40% are immune from infection, previous infection, the only people left, the majority of the people left that actually get infected are younger people. that doesn't belief it's selecting for younger people at all by no means. younger people do perfectly well either without treatment or early treatment. generally it's a my nowhere illness for most young people. >> and isn't mueller's reaction if i remember my impromptu, isn't that it becomes weaker more transmissible but weaker and weaker, dr. mccullough. >> yeah, that's true. unfortunately the virus wants to survive and if it kills its host too i can requestly it can't pop gate. the uk is predominately in the united states, we've done great with early treatment, got the pandemic under control and i think americans who really take a lot of hope that we're closing