An 84-year-old man walks out of the the strictly quarantined sections at Renmin Hospital affiliated to the Peking University on May 6.

An 84-year-old man walks out of the the strictly quarantined sections at Renmin Hospital affiliated to the Peking University on May 6.

An in-patient at Renmin Hospital affiliated to the Peking University walks out of the quarantined ward.

Medical personnel released from isolation hug with colleagues at the Jiangong Hospital in Beijing, May 6, 2004.

Medical personnel released from isolation receive a warm welcome at the Jiangong Hospital in Beijing, May 6, 2004.

Medical personnel and patients released from isolation pose for a photo at the Jiangong Hospital in Beijing, May 6, 2004. A total of 159 people kept in isolation for observation at Jiangong Hospital and People's Hospital after contact with SARS patients were released on Thursday.

A medical worker presents a bunch of fresh flowers to a doctor just freed from SARS quarantine at Renmin Hospital affiliated to the Peking University on May 6.