In addition, this study also showed the pathway between COVID-19 infection rate and median age of the national population (β = 0.118, [95% CI: 0.02,0.22 ],P = 0.024); population density per square kilometer, in which their relationship was statistically significant (β = -0.003,...
The Northeast had the highest population density at 4039.66 people per square kilometer, while the population density was low in the Midwest (381.48 people per square kilometer). The population density in the West and South regions was 550.86 and 596.23 people per square kilometer, respectively (...