Elderberries have been scientifically proven to improve cold and flu symptoms in randomi studies. They've also been found to show a "mild inhibitory effect" during early stages of the flu but appear to work even better at lessening symptoms once infected. That same study also observed elderberries can stop a virus from getting into a body and replicating, as well as boost immune response.

HOWEVER,  If you are exhibiting symptoms of COVID-19, or have tested positive for the coronavirus, consider avoiding elderberry products because there is some evidence that IF your immune cells are already infected with this virus, the properties in elderberries could potentially make the illness more complicated.

So, while elderberries do show effectiveness for the flu or common cold, they may not be the one to turn to for the coronavirus.