text:  How does COVID 19 affect intestinal microbiota There is a bidirectional interaction between the intestines and lungs the so called lung intestinal axis The review article reports on studies that deal with a possible influence of the intestinal microbiota on the immune response to a SARS CoV 2 infection Studies have shown that COVID 19 is accompanied by dysbiosis that persists even after successful virus conversion negative PCR One study found that the severity of COVID 19 is associated with the intestinal microbiota A dysbiosis could thus favor the so called cytokine storm There is indication that pre and probiotics could boost the immune response in both the guts and lungs 