MLF: Introduction: Metagenomics and metabolomics

SARS-CoV-2 responsible for COVID-19 enters the host body and interacts with the microorganisms already inhabiting the host. Understanding the virus-host-microbiome interactions can yield additional insights into the biological processes perturbed by viral invasion. Alterations in the gut microbiome species and metabolites have been noted during respiratory viral infections, possibly affecting the lungs via gut-lung microbiome crosstalk.