Neanderthal DNA is already associated with autoimmune diseases, type 2 diabetes, and prostate cancer. However, when researching the links between Neanderthal genes and Covid, Italian researchers discovered people with three specific Neanderthal gene variations were twice more likely to get severe pneumonia and three times more likely to be hospitalised with a ventilator after contracting the Covid virus.
https://www.mirror.co.uk/news/health/covid-patients-up-twice-likely-30974615