Therefore, the authors analyzed two gut microbe databases of COVID-19 patients (gutMEGA) and found that compared with the composition of non-COVID-19 gut microbes, the population of beneficial bacteria decreased significantly, while the number of harmful bacteria showed an increasing trend, which was similar to the change observed in the obtained bacteria carrying HFs (an increase in harmful Proteobacteria to 41% and a reduction in beneficial Firmicutes to 8%).
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