thought about as well. >> the car crash on the highway is a bigger story than the traffic is running smoothly and so the facts about covid-19 transmission need to reach viewers, need to reach readers and we need more explainers, you wrote about the faulty outdoor air transmission sites for example. but this week you wrote about the lab leak theory and how the conversation about the possible covid escaping the wuhan lab theory has been re-evaluate and reckoned with. why is this back in the news? >> so it is pretty clear that we don't know how covid started. many people think the most likely explanation is that it jumps from an nomianimal in wuh china. but it is also plausible with this research at a top virology