If it has not been proven that microorganisms cause diseases, how to explain the phenomenon of stasis? When people are faced with a situation where 2 or more people develop similar symptoms in the same place, people automatically assume that this is due to the transmission of microorganisms from healthy patients. But it's important to share the idea that people being sick at the same time means transferring something between them. These are two different categories. Maybe something is going on, but is it really? If not microorganisms, what can explain the phenomenon? I want to emphasize: it can. I don't pretend to know the exact reason. These are just a few possible options. Exposure to toxic substances eg: carbon monoxide, gas leaks, release of volatile organic compounds (VOCs) new carpet, furniture or paint, pesticides. Everyone who breathes the same air receives the same dose, so headaches, nausea, dizziness and fatigue can occur in several people at the same time, without passing the "contagion" from one to another. Eating together or using a single water source can cause illness for all involved. Some foods contain naturally occurring toxins, such as cabsod in improperly stored fish or lectins in the visible. A heavily contaminated system or piping can infect anyone who drinks from it. Air quality smoke from forest fires, low humidity, drying airways, and poorly ventilated rooms where CO2 accumulates. This causes headaches, sore throats, nasal congestion and fatigue for everyone in the room, especially in the colder months. Concentrations of dust, dust mites and pet hair. When the seasonal increase begins, everyone who has a similar sensitivity reacts at the same time, experiencing nasal congestion, snoring, itchy eyes and fatigue, which is very similar to "scare".