and didn’t you just know it all along:
“Writing in the medical journal Chest, Dr Stephen Rennard, said that he had always found that his grandmother’s chicken soup – made in traditional Jewish style complete with matzo dumplings – had been helpful during bouts of illness.
He decided to run laboratory tests not only on his family’s own recipe, but on 13 different commercial chicken soup brands.
“They found that many of the varied ingredients of the soups helped to stop the movement of white blood cells called neutrophils, which are a key body response to the challenge of viral infections.”