Is insomnia identified as a disease?

Insomnia is a sleep disorder that is characterized by difficulty falling and/or staying asleep. People with insomnia have one or more of the following symptoms: Difficulty falling asleep. Waking up often during the night and having trouble going back to sleep. It generally depends on the person to call it a disease or not.

DNA Helix, DNA Supercoils, Nucleosome, Chromosome
Small < Large