Turning to Turnips as a SARS Cure Tue April 15, 2003 10:31 AM ET BEIJING (Reuters) - A turnip a day keeps the SARS virus away, or so many in China's capital believe. Turnip prices have jumped in Beijing after the vegetable was touted as a key ingredient in a potion to fight the deadly virus that causes Severe Acute Respiratory Syndrome, peddlers said.