Already for SARS 2003 Quercetin was tested in the laboratory with good results https://jvi.asm.org/content/78/20/11334#T1
https://www.ncbi.nlm.nih.gov/pubmed/17046271
If anyone has a suspicion that Quercetin might only work for that specific coronavirus, it might be helpful to see that it has also been shown to work for viruses as diverse as influenza, Ebola, and hepatitis B:
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4728566/
- https://aac.asm.org/content/60/9/5182
- https://www.ncbi.nlm.nih.gov/pubmed/26268473
A supercomputer investigation analyzed 8000 chemical compounds in search of an antiviral for Covid-19 and concluded that Quercetin was among the 5 most appropriate: https://chemrxiv.org/articles/Repurposing_Therapeutics_for_the_Wuhan_Coronavirus_nCov-2019_Supercomputer-Based_Docking_to_the_Viral_S_Protein_and_Human_ACE2_Interface/11871402/4
The same conclusions were obtained, a few weeks ago, by one of the most renowned Canadian medical researchers and his team. This was explained on Canadian television. https://www.cbc.ca/player/play/1703883331818 and a radio interview: https://www.cbc.ca/player/play/1703914563515 As read here:https://www.macleans.ca/news/canada/a-made-in-canada-solution-to-the-coronavirus-outbreak/)
This is how China and other countries are currently testing Quercetin in clinical trials in collaboration with the Institut de Recherques Cliniques de Montreal https://ircm.qc.ca/ They could have results in early May, but this is not fast enough for thousands of people who die every day.
The ionization of Zinc to stop antiviral activity is documented, for example, here: https://pubs.acs.org/doi/10.1021/jf5014633 and here: http://www.tdx.cat/bitstream/10803/292248/1/Tesis%20.pdf
The chelation function of Quercetin, that makes it an optimal antioxidant and anti-inflammatory in the context of Covid-19has been proven in the study; https://www.ncbi.nlm.nih.gov/pubmed/16910729
Some doctors of the public health system are suggesting quercetin, vitamins C and D and zinc to their hospitals.This is the case of The medical school of Virginia in US
- https://www.evms.edu/covid-19/medical_information_resources/
- https://www.evms.edu/media/evms_public/departments/internal_medicine/Marik-Covid-Protocol-Summary.pdf
Also. Dr Mobeen, medical professor in India is suggesting to medical staff quercetin, vitamins C and D and zinc (in his case combined with hydroxychloroquine, since minute 27, and quercetin as alternative) https://www.youtube.com/watch?v=W9YFXo84lCk
Also suggesting quercetin Dr Leonard from New York: https://www.fox10phoenix.com/news/doctor-offers-coronavirus-protection-advice
Quercetin has been tested in clinical trials for many different diseases.https://clinicaltrials.gov/ct2/results?cond=&term=quercetin&cntry=&state=&city=&dist=&Search=Search
For Covid-19 Is involved in a Clinical trial in France where is compared to Hydroxychloroquine https://solidarites-sante.gouv.fr/IMG/pdf/covid19_projets-recherche_therapeutiques_en-cours-instruction.pdf
other trials involving natural products are:
- https://clinicaltrials.gov/ct2/show/NCT04264533 Clinical trial of threating Covid-19 with high vitamin C dosis
- https://clinicaltrials.gov/ct2/show/NCT04323514 2nd clinical trial of Covid-19 with high vitamin C dosis
- https://clinicaltrials.gov/ct2/show/NCT04334005 Clinical trial of using Vitamin D, for profilactic and first simptoms
There is 3 other clinical trials involving Hydroxychloroquine + C Vitamin + D vitamin + Zinc.
- https://clinicaltrials.gov/ct2/show/NCT04335084
- https://clinicaltrials.gov/ct2/show/NCT04334512
- https://clinicaltrials.gov/ct2/show/NCT04326725
Among nutritionists and natural health specialists, quercetin is suggested often including the American nutrition asociation
