In March 2003, the Severe Acute Respiratory Syndrome (SARS) outbreak in Singapore shook the whole society. Tan Tock Seng hospital was designated as the only hospital for SARS patients.

Lance Lee was commissioned by the Singapore History Museum (SHM) to document the work of its healthcare workers who risked their lives to save the patients and contain the outbreak. His photographs were exhibited for 3 months in SHM in late 2003. The images were also published in two commemorative books, "The Silent War" and ">38 deg, Remembering SARS"