Can Raising Vitamin D Status Slow Down Covid-19 Waves?

Several mitigation and suppression policies, such as social distancing, city lockdowns, remote working, testing, providing personal protective equipment and health care resource availability have been implemented by the governments in response to Covid-19 pandemic. Until now (October 23, 2020), over 1.14 million deaths in the world including 31,650 just in Iran have been officially attributed to this newly emerged viral disease (1). There is an enormous variation in the clinical symptoms of Covid-19, ranging from a mild common cold to severe symptoms such as acute respiratory distress syndrome (ARDS) and septic shock. Several factors may influence the severity of Covid-19 disease such as co-infection, co-morbidities, genetic and host factors including race, age, and obesity (2). Currently, there is no effective drug or vaccine available to treat or prevent the disease.