What do you think about the alternative to germ theory and the notion viruses are actually particles produced by the cells themselves as a consequence of certain stress factors
such as drugs and toxins? Let me illustrate why I think this is correct using 2 examples:

1. "If we ask bacteriologists which comes first: the terrain or the bacteria, the answer is always that it is the environment (the terrain) that allows the microbes to thrive. The germs, then, do not directly produce the disease". This is exemplified in the case of the oral cavity's Strep Mutans population increase after introducing grains to our diet:
https://youtu.be/yCPwD59sDvg?t=1020

2. "Practically all of the illnesses that affected people in industrialized countries in the decades before World War II (tuberculosis etc.) ceased to cause problems after 1945. For a few years, the major exception was polio (infantile paralysis), which continues to be called an infectious disease. In the 1950s, the number of polio cases in developed countries fell drastically—and epidemic authorities attributed this success to their vaccination campaigns. But a look at the statistics reveals that the number of polio victims had already fallen drastically when vaccination activities started (see diagram 2)".

"Many pieces of evidence justify the suspicion that the cause of infantile paralysis (polio) is not a virus. Many experts, like American physician Benjamin Sandler, believe a decisive factor is a high consumption of refined foods such as granulated sugar.312 Others cite mass vaccinations. Indeed, since the beginning of the 20th century, it has been known that the paralysis so typical of polio have often appeared at the site where an injection has been given.313 Additionally, the number of polio cases increased drastically after mass vaccinations against diphtheria and whooping cough in the 1940s, as documented in the Lancet and other publications".314 315 316

Excerpt from Virus Mania.