Japan reports spike in novel H1N1 casesHealth officials voiced concern over a surge in novel H1N1 influenza cases in Japan, particularly among young people, Agence France-Presse (AFP) reported today. Case numbers rose from 4 to 129 over the weekend, leading to more than 2,000 school closures. Many of the new cases are reported from Kobe and Osaka, where officials believe the virus spread during a high school volleyball tournament.