A team of scientists from NYC and China published these findings in the academic journal
Cellular & Molecular Immunology. This explains why vulnerable people have higher risk of death.
https://www.news-medical.net/news/20...-like-HIV.aspx
"Having a strong immune response during the incubation period can prevent the infection taking hold, reduce the actual quantity of virus in the body and prevent it from getting to the lungs."
https://www.sciencealert.com/why-do-...e-others-don-t
In another study, scientists discovered how this woman's healthy immune system defeated COVID-19 in 3 days.
https://www.medicalnewstoday.com/art...irus-in-3-days
To sustain a strong immune system, modern medicine recommends adequate sleep, minimize stress, maintain a healthy weight, good nutrition and avoid things that might weaken immunity (smoking, too much alcohol, junk or nutritionally-poor foods, etc.).
https://www.health.harvard.edu/staying-healthy/how-to-boost-your-immune-system
Tips for the immunocompromised:
https://www.verywellhealth.com/compr...munity-2615155