Breathless is the story of the worldwide scientific quest to decipher the coronavirus SARS-CoV-2, trace its source, and make possible the vaccines to fight the Covid-19 pandemic. Here is the story of SARS-CoV-2 and its fierce journey through the human population, as seen by the scientists who study its origin, its ever-changing nature, and its capacity to kill us. David Quammen expertly shows how strange new viruses emerge from animals into humans as we disrupt wild ecosystems, and how those viruses adapt to their human hosts, sometimes causing global catastrophe. He explains why this coronavirus will probably be a 'forever virus,' destined to circulate among humans and bedevil us endlessly. As scientists labour to catch, comprehend and control it, with their high-tech tools and methods, the virus finds ways of escape. Based on interviews with nearly one hundred scientists, including leading virologists in China and around the world, Quammen explains that infectious disease experts saw this pandemic coming; that some scientists, for more than two decades, warned that 'the next big one' would be caused by a changeable new virus - very possibly a coronavirus - but such warnings were ignored for political or economic reasons; and that the precise origins of this virus may not be known for years but some clues are compelling, and some suppositions can be dismissed. Breathless takes us inside the frantic international effort to understand and control SARS-CoV-2 as if peering over the shoulders of the brilliant scientists who led the chase.