People began to live longer. This is an indisputable fact, as is the fact that life expectancy has increased not due to being in a state of youth, youth or maturity, but due to the lengthening of the period of old age. This could not help but be noticed by other inhabitants of the planets - viruses that mutate at lightning speed, hacking the body’s protective functions. Here is a historical and medical study by geriatrician, neurologist and neurophysiologist Valery Novoselov about the two largest epidemics in Russia: the Spanish flu virus and coronavirus. How are the largest pandemics similar and different? Why has COVID-19 scared modern times so much? Is this due to the danger of the virus itself or to the way it is presented to the public by the media, doctors and public figures? You will learn how terrible epidemics happened, how to protect your body in the era of new viruses.