Why Some People Are Protected Against Covid-19, Study Reveals
NDTV
A groundbreaking study reveals that some people never contract COVID-19 due to a rapid immune response in nasal tissues.
A new study published in the science journal Nature has revealed why some people never get COVID-19, even after exposure. Researchers conducted a world-first experiment where they intentionally infected healthy volunteers with a pre-Alpha strain of SARS-CoV-2.
They found that people who resist infection have a much faster immune response in their nasal tissues compared to those who get sick. This response includes the activation of mucosal-associated invariant T (MAIT) cells and a drop in inflammatory white blood cells, which clear the virus before it sets in.
The study also found that people who resist infection have elevated expression of a gene called HLA-DQA2 in nasal cells.
