arrive at dr. he was a principle investigator on ground and may be i don't know exactly how regulations are written but in general terms you would think he would be first oversight person responsible for making sure that his sub grant like dr. xi were working in safe conditions. but now if i can take one step further back than that. as i've mentioned dr. xi was working in this exactly same rule as followed by virologist all around world and one of the virologist set these rules far too low to be easy on themselves they didn't like suiting up in a bubble suit for the bsl level 4 that's what you see the pictures of dr. xi in that wearing one of these -- bubbles or not the condition she was working. so it may be that responsibility is also shared to be looked at in terms of what the virology