Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The distribution of number of research papers published on PubMed and Web of Science over the past two decades. The results plotted in the graph were obtained by searching the cited databases for articles published over the past two decades. The search keywords were as follows: [(COVID) OR (coronavirus) OR (COVID-19) OR (2019-nCoV) OR (SARS-CoV-2)] AND [(gut) OR (microbiota) OR (diabetes) OR (obesity)].
