An outbreak of type π vaccine-derived poliovirus in Sichuan province, China: emergence and circulation in an under-immunized population.

Background: During August 2011-February 2012, an outbreak of type Π circulating vaccine-derived poliovirus (cVDPVs) occurred in Sichuan Province, China.

Methods: A field investigation of the outbreak was conducted to characterize outbreak isolates and to guide emergency response. Sequence analysis of poliovirus capsid protein VP1 was performed to determine the viral propagation, and a coverage survey was carried out for risk assessment.

[Assessment of health education against echinococcosis in Tibetan region of Sichuan Province, China].

Objective: To find an effective strategy of implementing health education in Tibetan Regions so as to make echinococcosis control sustainable at a large scale.

Methods: During July to November of 2008, surveys were conducted on health education requirements among various populations in the form of questionnaire and group discussion in endemic areas of echinococcosis in three counties of the Ganzi Tibetan Autonomous Prefecture, Sichuan. Based on the obtained results, health education materials suitable for different populations were designed.