Mask-wearing and respiratory infection in healthcare workers in Beijing, China Peng Yang, Holly Seale, C. Raina MacIntyre, Haiyan Zhang, Zhen Zhang, Yi Zhang, Xiaoli Wang, Xinyu Li, Xinghuo Pang, Quanyi Wang

Prevalence of hepatitis B and C virus infections among military personnel Livia M. Villar, Kycia Maria R. do Ó, Leticia P. Scalioni, Helena M. Cruz, Moyra M. Portilho, Ana Carolina F. Mendonça, Juliana C. Miguel, Andreza S. Figueiredo, Adilson J. de Almeida, Elisabeth Lampe

Recommendations for hygiene of masks and circuits in mechanically home ventilated patients Michel Toussaint, Gregory Reychler