It has nothing to do with the theory of  autogenesis. The autogenic hypothesis postulates that the  organelles in eukaryotic cells were formed from the enfolding of  the cell membrane in prokaryotes.
How long does the flu last? For most healthy people, the flu is an uncomfortable but short-term illness that resolves itself as the immune system fights it off. Symptoms usually appear from one to four days after exposure to the virus, and they last five to seven days. For people who've had a flu shot, the symptoms may last a shorter amount of time, or be less severe. For other people, the symptoms may last longer. Even when symptoms resolve, you may continue to feel fatigued.
In worst case scenarios, vomiting and nausea can also be observed, which is often mistaken as the stomach flu or the 24-hour long influenza. Many people who suffer through this ask the question that how long does a fever last with the flu. High fever is the most common symptom of any sort of flu and occurs 99 percent of the times during flu. How long does a fever last with the flu usually depends on how strong a person in internally and the type of diet the person keeps.