New research looking at the link between environmental temperatures and incidence, mortality and recovery of COVID-19 patients indicates that the virus may be seasonal, similar to other respiratory viruses such as influenza.
The study authors added: “Other biological factors can also be relevant. Low-temperature seasons are often associated with vitamin D deficiency because of seasonal reductions in exposure to ultra-violet (UV) radiation. Low levels of vitamin D have been shown to impair the body’s antimicrobial peptide system, which is responsible for regulating the immune response.”
Additionally, they said, “Seasonal changes in length of day can interfere with an individual’s circadian rhythm, which is regulated by the release of the hormone melatonin. This interference can weaken the immune system and increase the risk of infection.”
SOURCE: Evolutionary Bioinformatics January 26, 2021