This is the name given to the phenomenon that some people who regularly occupy a building (eg office workers) in which experience several uncomfortable symptoms, especially when they spend much time inside. Symptoms tend to be those of the flu or allergy, and may include headaches, burning or itchy eyes, stuffy nose, sneezing, coughing, sore throat, chest tightness, dry or itchy skin , dizziness, difficulty concentrating, nausea and fatigue.

People with asthma or allergies may find that their symptoms usually get worse while they are in that building. But what is the cause of this problem? Sick building syndrome is controversial, since it is difficult to definitively link the wide range of people who experience symptoms of a recognized disease or who suffer from this problem. It is believed that the syndrome is the result of poor air quality inside the building.

This can be caused by inadequate ventilation or poor maintenance of air conditioning systems. Also different chemical contaminants used in the interior can be triggers. Air pollution can occur in any building, but is particularly common in modern office buildings, which often have sealed windows and ventilation systems recirculate air most of the interior.

Most air pollution comes from domestic sources. Individual contaminants may be present at low levels, but the combination of many pollutants may be harmful. Many building materials and office supplies emit small amounts of toxins.

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Nabarro said that there is still a risk of a pandemic if the avian flu virus mutates into a form that passes easily between humans. The H5N1 flu strain is highly pathogenic, has caused the death or destruction of nearly 300 million birds since it resurfaced in Asia in 2003.

While H5N1 rarely infects people, has killed 241 of 383 infected in 15 countries. Concern about the disease in the world increased in 2005, as cases were known in Europe, Middle East and Africa.

Nabarro also said in a press conference of the UN that “there has been an extraordinary global response to the virus from spreading (…) (…) which has meant that now the continuous transmission of the virus occurs only in four, perhaps five countries.
The situation improved

Elsewhere, he added, “the situation is actually improving.”Countries generally have invested massively to improve the functioning of their veterinary services, and security (…) about the birds that are reared has generally improved.

Nabarro said the UN is concerned primarily with Indonesia, which has the highest number of human cases, but also Vietnam, Bangladesh and Egypt. The situation in Nigeria “has really calmed down this year,” he said.

He cited South Korea and the United Kingdom as examples of countries that responded vigorously to recent bird flu outbreaks. A total of about 2,700 million dollars were committed to combat the disease in a series of international conferences.

The world is also much better prepared than it was in 2005 to deal with a possible pandemic, with nearly 160 countries have plans in place, Nabarro said. United States, Australia and Singapore conducted simulations to see how their financial sectors react to an outbreak of bird flu.

“What these exercises are showing is that it is not expensive to prepare for a pandemic and that if you’re ready for a pandemic, it also helps you prepare for other contingencies,” he said.

But Nabarro, who warned in September 2005 that between 5 million and 150 million people could die in a flu pandemic was expected “soon”, said yesterday he was not saying the threat was gone.

The most serious pandemic of modern times, in 1918, left about 40 million people dead. The H5N1 “still can rekindle a smoldering forest fire.” “I still can return at any time if you do not care,” he said.

“We anticipate that there will be another pandemic at some point could become (…) (in type that is spread) from human to human at any time (…) The chance is still there and that has not changed,” he said.

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