1. Inhibition of Several Strains of Influenza Virus in Vitro and Reduction of Symptoms by an Elderberry Extract {Sambucus nigra L.) during an Outbreak of Influenza B Panama.

Journal of Alternative Complementary Medecine . Winter 1995;1(4):361-9.  

Z Zakay-Rones, N Varsano, M Zlotnik, O Manor, L Regev, M Schlesinger, M Mumcuoglu

https://www.liebertpub.com/doi/abs/10.1089/acm.1995.1.361

  1. Randomized Study of the Efficacy and Safety of Oral Elderberry Extract in the Treatment of Influenza A and B Virus Infections

Journal of International Medical Research. Mar-Apr 2004;32(2):132-40.  

Z Zakay-Rones, E Thom, T Wollan, J Wadstein

https://journals.sagepub.com/doi/abs/10.1177/147323000403200205

  1. Elderberry Supplementation Reduces Cold Duration and Symptoms in Air-Travellers: A Randomized, Double-Blind Placebo-Controlled Clinical Trial

Nutrients . 2016 Mar 24;8(4):182.  Evelin Tiralongo, Shirley S. Wee, and Rodney A. Lea

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4848651/pdf/nutrients-08-00182.pdf

  1. Black elderberry (Sambucus nigra) supplementation effectively treats upper respiratory symptoms: A meta-analysis of randomized, controlled clinical Trials

Complementary Therapies in Medicine Volume 42, February 2019, Pages 361-365.  Jessie Hawkins, Colby Baker, Lindsey Cherry, Elizabeth Dunne

https://www.sciencedirect.com/science/article/abs/pii/S0965229918310240?via%3Dihub

  1. A Systematic Review on the Sambuci fructus Effect and Efficacy Profiles.

Phytotherapy Research.  2010 Jan;24(1):1-8.  J E Vlachojannis, M Cameron, S Chrubasik

https://onlinelibrary.wiley.com/doi/abs/10.1002/ptr.2729

  1. Inhibitory activity of a standardized elderberry liquid extract against clinically-relevant human respiratory bacterial pathogens and influenza A and B viruses

BMC Complementary and Alternative Medicine 2011, 11:16.  Christian Krawitz, Mobarak Abu Mraheil, Michael Stein, Can Imirzalioglu, Eugen Domann, Stephan Pleschka, Torsten Hain

https://bmccomplementmedtherapies.biomedcentral.com/track/pdf/10.1186/1472-6882-11-16

  1. Sambucus nigra extracts inhibit infectious bronchitis virus at an early point during replication

BMC Veterinary Research 2014, 10:24.  Christie Chen, David M Zuckerman, Susanna Brantley, Michka Sharpe, Kevin Childress, Egbert Hoiczyk, and Amanda R Pendleton

https://bmcvetres.biomedcentral.com/track/pdf/10.1186/1746-6148-10-24

  1. Interfering With Lipid Raft Association: A Mechanism to Control Influenza Virus Infection By Sambucus Nigra

Iran J Pharm Res. 2017 Summer; 16(3): 1147–1154. Shahla Shahsavandi, Mohammad Majid Ebrahimi, and Ameneh Hasaninejad Farahani

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5610768/pdf/ijpr-16-1147.pdf

  1. Plant-made virus-like particles bearing influenza hemagglutinin (HA) recapitulate early interactions of native influenza virions with human monocytes/macrophages

Vaccine Volume 35, Issue 35, Part B, 16 August 2017, Pages 4629-4636. Alexander I. Makarkov, Sabrina Chierzi, Stéphane Pillet, Keith K. Murai, Nathalie Landry,Brian J. Ward

https://www.sciencedirect.com/science/article/pii/S0264410X17309088?via%3Dihub