Deadly virus may become a global pandemic, a CDC disease expert warns.
Worldwide killer bug warning
Efforts to stop a deadly pneumonia may not prevent a global explosion in cases, a world-leading infectious disease expert has warned.
Dr Julie Gerberding, a director of the US Centers for Disease Control (CDC), said on Thursday that a massive scientific drive to beat the illness may be too late to prevent a major outbreak across every continent of the world.
Experts from the World Health Organisation (WHO) finally reached Guangdong province in China on Thursday, thought to be at the e-p-i-c-entre of the Sars outbreak, where they will start work trying to unmask the source of the illness.
In an unprecedented move on Wednesday, the WHO told travellers to postpone non-essential trips to this part of China, or Hong Kong, where there have been hundreds of probable cases and dozens of deaths.
There have been 72 probable cases of Sars in the US so far, but Dr Gerberding fears that the worst could yet be to come.
In the New England Journal of Medicine, she wrote: "A very sobering question remains - are we fast enough?
"Can we prevent a global pandemic of Sars?"
"If the virus moves faster than our scientific, communications and control capacities, we could be in for a long, difficult race.
"The stakes are high, and the outcome cannot be predicted."
Scientists are worried about Sars because it is possible that it could, in some cases, become airborne and infect people far more easily.
If this is the case, then it would become far more difficult to contain.
There is now strong evidence that the illness is caused by a new strain of Corona virus, although this is not yet proven.
The WHO delegation in Guangdong province will investigate theories that the virus "jumped" from animals into humans.
The WHO travel advice does not apply yet to other areas, such as Singapore, Vietnam or Canada, where outbreaks appear to have been effectively contained.
As well as the latest deaths in Guangdong, China said there were 361 new cases in the province in March.
Health officials said several cases of Sars have also been discovered in Shanghai, China's second-largest city.
In Taiwan, a 30-minute public information programme about the risks of Sars was broadcast on Thursday.
Teachers, government employees and servicemen were all "obliged" to watch it.
Meanwhile, Canada, the worst-affected country outside Asia, said two more people have died from Sars in Toronto, bring to six the total number of fatalities in Canada.
The country has imposed mandatory quarantine on two people it said had been in contact with Sars patients, and were choosing to disregard instructions to stay away from other members of the public.
In Thailand, authorities have said that they are prepared to quarantine - for weeks if necessary - every passenger on any aircraft found to be carrying a Sars patient.
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