i am marion koopmans. i'm a professor of virology. i am marion koopmans. the origins mission international team because of my expertise on viruses at the human—animal interface and virus transmission studies. i have read about pandemics, i have studied them, i have worked in this field for 30 years but experiencing one is a whole different ball game. professor koopmans has been at the heart of one of the world's biggest unsolved mysteries for over a year. it is hard. work has been crazy. pressure on my loved ones, like everyone, has been crazy. being part of these kinds of discussions comes at a price. not everyone is happy with the scientist positions on this, so there are threats like every high profile virologists. you have had physical violent threats? oh, yes. nine months ago, professor koopmans flew to the first epicentre of the outbreak with other international experts to try and find out how the pandemic began. wuhan city, home to 11 million people and the most populated city in central china. it prides itself on being an international hub for scie