Echinacea Herbal Tea Research Reference

US National Library of Medicine National Institutes of Health

Medicinal properties of Echinacea: a critical review: https://www.ncbi.nlm.nih.gov/pubmed/12622467

Effects of drinking hot water, cold water, and chicken soup on nasal mucus velocity and nasal airflow resistance: https://www.ncbi.nlm.nih.gov/pubmed/359266