Echinacea (E. angustifolia, E. purpurea, E. pallida.) are plants related to sunflowers and ragweed. The leaf, flower, and root are used as medicine.

Echinacea species are native to areas east of the Rocky Mountains in the United States. Echinacea seems to activate chemicals in the body that decrease inflammation. It might also increase the body's immune system.

Echinacea is most commonly used for the common cold and other infections, but there is no good scientific evidence to support most of these uses. There is also no good evidence to support using echinacea for COVID-19.

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