“…pylori infection might, thus or otherwise, be a cause of human gastric cancer (Paull and Yardley, 1989;Correa and Ruiz, 1989;Fox et al, 1989;Parsonnet, 1989), and some preliminary studies in communities at increased risk of gastric cancer have indicated a high prevalence of H . pylori infection (Correa and Ruiz, 1989;Fox et al, 1989), especially at young ages (Gutierrez et al, 1988;Klein et al, 1989;Dehesa et al, 1989). We report here a geographic correlation of gastric cancer mortality rates in 46 rural Chinese counties with H .…”