4 URLs in this Link

journals.plos.org

https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0180554&type=printable

www.ncbi.nlm.nih.gov

Increase of SARS-CoV-2 RNA load in faecal samples prompts for rethinking of SARS-CoV-2 biology and COVID-19 epidemiology - PMC

pubmed.ncbi.nlm.nih.gov

Toxin-like peptides in plasma, urine and faecal samples from COVID-19 patients - PubMed