During the COVID-19 pandemic, sleep issues like insomnia became common and have persisted beyond the disease. A study published in the Journal of Personalized Medicine found that sleep disorders amount to 50 to 75 percent of all post-COVID symptoms. Although it’s a “post-COVID symptom,” insomnia is not only caused by the virus itself.  
We’ve talked about various chronic post-COVID symptoms. But sleep dysfunction after COVID infection might not be caused by the virus only. Very likely it has to do with the lack of daily movement, lack of social interaction, and increased stress due to the lockdown measures.
A study has adopted a commonly used animal model to research the impact of chronic stress caused by repeated social interaction failure on health. A group of smaller, weaker rats were put into the cage of stronger, aggressive rats. …