High HDL good cholesterol greatly reduces risk of infection with the new coronavirus (SARS-CoV-2)

A group from The Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain etc. has reported that high HDL good cholesterol significantly reduces the risk of covid-19 infection.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7852244/

As shown in the figure below, it can be shown that as HDL cholesterol increases, the risk of infection with the new coronavirus (SARS-CoV-2) is reduced monotonically. The statistical analysis was performed with data from 317,306 people. By multiplying 38.66535, mmol/L can be converted to mg/dL.