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How These London Doctors and Nurses Don't Get Sick

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Dr. Holly Lucille Dr. Holly Lucille, ND, RN, is a licensed Naturopathic Doctor, educator, consultant, television, and radio host. Her enthusiasm for helping people feel better shines in her dedication. Her passion as an advisor on several medical and natural products boards, including the chair of the Institute for Natural Medicine has earned her several prestigious awards.

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2 Krawitz C, Mraheil MA, Stein M, et al. Inhibitory activity of a standardized elderberry liquid extract against clinically-relevant human respiratory bacterial pathogens and influenza A and B viruses. BMC Complement Altern Med. 2011;11:16. Published 2011 Feb 25. doi:10.1186/1472-6882-11-16 [link]

3 Zhai Z, Liu Y, Wu L, et al. Enhancement of innate and adaptive immune functions by multiple Echinacea species. J Med Food. 2007;10(3):423-434. doi:10.1089/jmf.2006.257 [link]

4 Ross SM. Echinacea purpurea: A Proprietary Extract of Echinacea purpurea Is Shown to be Safe and Effective in the Prevention of the Common Cold. Holist Nurs Pract. 2016;30(1):54-57. doi:10.1097/HNP.0000000000000130 [link]

5 Park S, Lee MS, Jung S, et al. Echinacea purpurea Protects Against Restraint Stress-Induced Immunosuppression in BALB/c Mice. J Med Food. 2018;21(3):261-268. doi:10.1089/jmf.2017.4073 [link]

6 Chiou SY, Sung JM, Huang PW, Lin SD. Antioxidant, Antidiabetic, and Antihypertensive Properties of Echinacea purpurea Flower Extract and Caffeic Acid Derivatives Using In Vitro Models. J Med Food. 2017;20(2):171-179. doi:10.1089/jmf.2016.3790 [link]

7 Barnes J, Anderson LA, Gibbons S, Phillipson JD. Echinacea species (Echinacea angustifolia (DC.) Hell., Echinacea pallida (Nutt.) Nutt.,Echinacea purpurea (L.) Moench): a review of their chemistry, pharmacology and clinical properties. J Pharm Pharmacol. 2005;57(8):929-954. doi:10.1211/0022357056127 [link]

8 Christensen KB, Petersen RK, Petersen S, Kristiansen K, Christensen LP. Activation of PPARgamma by metabolites from the flowers of purple coneflower (Echinacea purpurea). J Nat Prod. 2009;72(5):933-937. doi:10.1021/np900003a [link]

9 More references [link]