Health officials warned the public Friday to throw away any herbal tea purchased from a Chinatown shop, after two people became critically ill after consuming the tea which was found to contained Aconite, a lethal poison. In separate incidents from February and March, a woman in her 50s and a man in his 30s became gravely ill within an hour of drinking tea made from leaves supplied by the same San Francisco herbalist. The tea leaves were purchased at the Sun Wing Wo Trading Company, located at 1105 Grant Ave. in Chinatown in San Francisco. Each person quickly became weak,...