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.
What are the symptoms of the flu? Each person may experience symptoms differently, but people usually become very ill with several, or all, of the following symptoms: High fever. Headache. Runny or stuffy nose. Sneezing. Cough, which often becomes severe. Severe aches and pains. Extreme exhaustion. Sore throat (less common) Fever and body aches usually last for three to five days, but cough and fatigue may last for two weeks or more. The symptoms of the flu may look like other medical conditions. Always consult your health care provider for a diagnosis.