This is where samples of some of the most dangerous pathogens in the world are kept. To reach the containment facility we are escorted past several sets of wire fences and a number of checkpoints. We reach a modern looking building so sensitive that even parts of the exterior cannot be filmed. Inside, past more layers of security, are the Containment Labs themselves. These are designed to allow research on some of the illnesses you least want to contract; Ebola, Bubonic Plague, Marburg Virus. And now of course SARS-CoV-2, the coronavirus. On the day we visit, one of the labs is free. We enter, one by one, through a series of doors. These maintain negative air pressure in the lab; the pressure inside is lower than the pressure outside so that if anything nasty does escape it should be blown back inside.