The Hebrews had “folk remedies” that said, “onions were a battlefield balm for wounds” and “colds were treated with onions”. They were later called wives tales by people but Louis Pasteur found out that the onion was an antibacterial and a Russian scientist said that onions block viruses that cause colds.
In other words, if you put onion in your daily diet you should have much few colds if any. I haven’t had a cold for over three years.
If everyone ate onions on a daily basis for a few years, we might stink up the place, but we could literally destroy the common cold viruses.