The authors planned this book during the 2014–2016 Ebola epidemic and wrote it during the Zika outbreak. In the process, they did not forget about the 2002 SARS coronavirus epidemic, the 2009 H1N1 influenza outbreak and the 2012 MERS coronavirus. Finally, after all this, the world was faced with the COVID-19 pandemic. And according to the assurances of the authors, the next pandemic will definitely come, and after that another and another.