The human microbiome is affected by changing diet, lifestyle, environment and medical interventions

SARS-CoV-2 is part of a family of coronaviruses that cause a wide spectrum of disease, from the common cold to the highly pathogenic severe acute respiratory syndrome and Middle East respiratory syndrome. A large part of the reason that SARS-CoV-2 is so problematic is its broad range of effects, from asymptomatic infections in some individuals to fatal disease in others. Other researchers have reviewed mechanistic details regarding what is known about the virus. Here, the focus will be on the emerging data on host factors that might contribute to the wide range of severity.
There are many risk factors, along with extensive research related to each, so this discussion cannot be comprehensive. The focus of the first part of this review will be on the most common COVID-19 comorbidities[13] and what research suggests might be the safest and most easily altered lifestyle and dietary factors that might ameliorate them and possibly reduce COVID-19 morbidity and mortality.