Echinacea reduced the likelihood of participants catching a cold naturally (i.e. in normal circumstances such as working with someone who has a cold) by 65%. Professor Ron Cutler of the University of London said that Echinacea, “decreases the severity of cough, headache and nasal congestion,” if people have already caught a cold. He gave it as his opinion that, “people with impaired immune function might benefit from taking Echinacea during the winter months to prevent colds and flu.”
There have, however, been several positive trials on Echinacea in the last few years, including a trial that demonstrated the efficiency of Echinacea in the treatment of colds and flu, when it is used as soon as a cold starts. At 7 days, 95% of the subjects using Echinacea were free of symptoms compared with only 63% in the placebo group.
Furthermore the observed virucidal activity of Echinacea was not restricted to common cold coronaviruses, as both SARS-CoV-1 and MERS-CoVs were inactivated at comparable concentrations. Echinacea purpurea preparations could be effective as prophylactic treatment for all CoVs due to their structural similarities.
Related article: >Echinacea effective against Swine Flu.
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