"...studies have shown that astragalus has antiviral properties and stimulates the immune system, suggesting that it may help prevent colds."
https://www.umm.edu/health/medical/altmed/herb/astragalus
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"...studies have shown that astragalus has antiviral properties and stimulates the immune system, suggesting that it may help prevent colds."
https://www.umm.edu/health/medical/altmed/herb/astragalus