On March 12, 2003 (February 10, 2003) the World Health Organization (WHO) issued the World Health Organization (WHO) Global Warning on SARS, and on March 17, 2003 the World Health Organization (WHO) established a virtual research network to communicate and share SARS information in a timely manner; on March 12, 2003, the World Health Organization (WHO) delivered the latest SARS research dynamics to global readers in a network (websites and emails). The World Health Organization (WHO) issued a tourism warning to these regions on April 2, 2003, given the continued spread of the SARS epidemic in Hong Kong and Guangdong China.