SARS arrived in Hong Kong in February 2003, when a doctor who had treated some of the cases of SARS at Sun Yat-Sen Memorial Hospital in Guangdong came to attend a family gathering. Dr. Liu Jianlun, Hong Kong's index patient, checked into the Metropole Hotel on February 21, with a room on the ninth floor, specifically room 911. Even though he was already feeling somewhat ill he visited with his family and they traveled around Hong Kong. By the morning of February 22, he knew he was very sick and walked over to seek care at nearby Kwong Wah Hospital. He eventually died there in the Intensive Care Unit on March 4. As he likely had diarrhea, on the night of February 21, he created airborne fecal clouds in his bathroom by flushing the toilet. Those fecal clouds then traveled into the hallway because his room was positively pressurized. Nine 9th floor guests and one visitor breathed in airborne SARS from his fecal cloud and contracted SARS. Surprisingly, his wife who was with him the entire time did not contract SARS. Liu's brother-in-law sought medical treatment in late February, entered the hospital on March 1, and died on March 19. Twenty-three other guests from the Metropole developed SARS, seven of them from the ninth floor, and it is estimated that around 80% of the Hong Kong cases were due to Liu.[7]