Suspect Cases
There were no new suspect cases admitted today.
SINGAPORE may yet be declared Sars-free by Sunday.
Early test results for some of the patients and health-care workers from the Institute of Mental Health (IMH), who are down with fever, indicate they have caught a virulent strain of the flu bug, and not the Sars virus
Five staff members have already been discharged from Tan Tock Seng Hospital (TTSH), as they have had no fever for more than 48 hours.
But it is too early to start chilling the champagne, because it will take at least 48 hours for additional testing to confirm that IMH is Sars-free.
Until then, the Health Ministry will treat the cluster of cases at Singapore's main mental hospital as a Sars outbreak.
The outbreak at IMH started with one patient running a temperature on May 7. As more patients and staff fell ill, they were moved to TTSH and the institute stopped admissions and outpatient and emergency services.
Yesterday, the ministry said 30 patients and 13 staff members remain warded in TTSH.
Health authorities initially feared a breach of Singapore's ring-fence strategy and that a new wave of infections could be spreading.
But yesterday's news changes things. Samples taken from 15 people in the IMH cluster were negative for the coronavirus.
In addition, scientists found the influenza B virus in three of five people tested for it.
Influenza B does not spread as easily as the A virus, the usual cause of flu epidemics and pandemics, but it can be as deadly.
Like Sars, it is spread by droplets. Symptoms are highly similar: fever, muscle ache, headache, cough and shortness of breath.
But doctors say it is more infectious than Sars. And it is not unusual for it to spread in hospitals.
So there is growing optimism on the part of health authorities that an IMH Sars cluster may be a false alarm.
There was some hint of this in the World Health Organisation statement on Wednesday. It said its team in Singapore reported 'some signs that patients in the cluster, many of whom are elderly, may be ill from causes other than Sars'.
And yesterday, a cautiously optimistic Sars combat team chief, Mr Khaw Boon Wan, said: 'A few of the cases are influenza but so long as there's one which is Sars, then to me, it's a Sarscluster.'
'Hopefully, IMH is a false alarm. If it turns out to be influenza, then we have a lucky break here, but that doesn't mean the end of the battle. We must maintain vigilance,' he said.
If confirmed that the cluster is not Sars, Singapore resumes its 20-day countdown to being officially Sars-free on Sunday. The last infection occured on April 27.
Singapore will then join Vietnam and Canada, both having had no local transmissions for two incubation periods of 10 days, the most important of several requirements set by WHO.
Close to 8,000 people worldwide have been infected - 600 have died. In Singapore, the tally remains at 205 cases.
So far 157 have recovered and 28 have died. Another 19 are in hospital, seven in intensive care.
Institute of Mental Health (IMH)
There are currently 30 inpatients and 13 staff from IMH warded in TTSH for observation of fever. They are all in stable condition. The patients are from Wards 64, 65, 35 and 50B. 5 staff have been discharged today as they have had no fever for more than 48 hours.
So far, PCR testing for coronavirus has been negative in samples taken from 15 patients, including the 5 staff who were discharged today. Of 5 patients who were tested, 3 were positive for influenza B virus. As investigations are still in progress, the IMH cluster will continue to be managed as a SARS outbreak.
Travel Advisory
MOH urges the public to heed the World Health Organisation (WHO)'s advice to postpone travel to Beijing, Hong Kong, Guangdong, Shanxi, and Taipei until another time
World Health Organization
http://www.who.int/csr/sars/archive/2003_05_15/en/
Update 56 - Situation in China, new WHO guidelines on blood safety, guidance for mass gatherings
Situation in China
Chinese authorities have today reported 52 new probable cases and 4 deaths, bringing the cumulative total in mainland China to 5163 probable cases and 271 deaths.
Most new cases were reported in Beijing (27), Shanxi (7), and Hebei (6). The 4 new deaths were reported in Beijing (1), Hebei (1), Inner Mongolia (1), and Tianjin (1).
The Chinese Ministry of Health is now providing the dates when the most recent probable and suspect cases were reported. New cases continue to be reported in all provinces.
The joint Ministry of Health-WHO team in Guangxi will soon complete its mission. Team members report that some probable cases may have been misclassified as suspect cases, though the number of such cases is expected to be small. Based on visits and a review of data, the team is of the view that large scale unreported transmission is not occurring in the province.
New guidelines on blood safety
WHO has today issued a series of recommendations as precautionary principles to address the theoretical risk that SARS might be transmitted through the transfusion of labile blood products. WHO is stressing that the recommended measures are precautionary.
Update on cases and countries
As of today, a cumulative total of 7699 probable cases and 598 deaths have been reported from 29 countries. This represents an increase of 85 new cases and 11 deaths compared with yesterday. The new deaths occurred in China (4) and Hong Kong SAR (7).
Taiwan, China reported 26 new cases and no new deaths today, bringing the cumulative total to 264 probable cases and 30 deaths. Taiwan now ranks just below mainland China in the number of new cases reported since yesterday. Hong Kong SAR reported 5 new probable cases and Singapore reported no new probable cases today.