Bacteria in the gut may protect against viruses by signalling their presence to the immune system. — via healthing_ca
Illustration of the initial stage of COVID-19 infection: SARS-CoV-2 virus particles binding to specific receptors on the surface of cells.
Sometimes the immune system is dangerously at high alert and overreacts. In this case, the immune cells mount an especially strong inflammatory response — one that goes beyond what is required to kill the virus. This extra-strong attack releases cytokines and chemokines on a massive scale throughout the body, resulting in a, which causes widespread inflammation and tissue damage in patients with severe COVID-19.
When studying the microbiome, scientists examine the composition and function of this ecosystem. We have learned that both composition and function of the gut microbiome are important The gut microbiome regulates host defences against viral infections including respiratory viruses, such as. This occurs through the activation of immune antiviral mechanisms and the prevention of excessive inflammation.
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