While some have already caught the coronavirus for the second or perhaps even third time, there are also people who have not yet had COVID-19 at all.
What is so special about the latter? Are they just lucky or do they have special genetics?
There are actually several factors that influence the likelihood of getting Covid-19. The influence of genetic factors, past infections, different coronaviruses, luck, caution and statistics is explained by molecular biologist Martin Moder in this video.
Sources:
Asymptomatic courses due to HLA-B*15:01
ncbi.nlm.nih.gov/pmc/articles/PMC8142661
Protection by seasonal coronaviruses:
cell.com/cell-host-microbe/fulltext/S1931-3128(22)00358-4
nature.com/articles/s41590-022-01292-1
