Reproductive Immunology: Open Access

Abstract

COVID-19 when it infects a person has revealed a common Achille’s heel of many comorbid conditions / diseases that be- ing the deficiency of Vitamin D3. The long-held presumptions that Vitamin D3 is required mainly for healthy bones and that adequate D3 comes from living in sunny climates has been shat- tered. Vitamin D3 deficiency (VD3D) is the common denomi- nator of the presence and severity of asthma, cardiovascular disease, diabetes (Type II), obesity, Alzheimer’s Disease, Parkin- son’s Disease, Multiple Sclerosis, Inflammatory diseases inter alia. Persons hospitalized with moderate to severe COVID-19 have Vitamin D3 deficiency (>80%). Persons whose VD3D is ad- dressed in the hospital have improved survival rates. The un- derlying conditions most often associated with COVID-19 are Vitamin D3 deficiency, advanced age (decreased T cell count with age), genetic predisposition (Down Syndrome, DiGeorge Syndrome, Neanderthal Chromosome 3), and co-morbid condi- tions strongly related to VD3D.