Sentinel surveillance of influenza and other respiratory viruses, Brazil, 2000–2010 Felipe Teixeira de Mello Freitas

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

Childhood respiratory viruses in public health care centers Poliana Castro de Resende Bonati, Carlos Martins da Silva