For a long time, researchers contested the presence of microscopic pathogens suspected of causing various diseases in plants and animals. The invention of the electron microscope in 1933 made them ...

With its many variations, its ability to mutate, evade population immunity, and spread throughout the population, and its potential to cause serious illness and even death, the influenza viruses are ...

Suddenly they appear and -- like the SARS-CoV-2 coronavirus -- can trigger major epidemics: Viruses that nobody had on their radar. They are not really new, but they have changed genetically. In ...