Fig. 1From: Evaluating the potential impact of targeted vaccination strategies against severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV) outbreaks in the healthcare settingTransmission trees of Middle East Respiratory Syndrome and Severe Acute Respiratory Syndrome in healthcare settings. a. MERS outbreak in South Korea from May to July 2015 [10, 22,23,24]. b. SARS outbreak in Singapore from February to May 2003 [25]. c. SARS outbreak in Toronto from February to April 2003 [26]. The nodes in the transmission tree correspond to cases in the outbreak and the colors indicate the exposure category: patients, family/visitor, healthcare worker, and non-clinical staffBack to article page