The more the avian flu virus spreads, the greater the chances of a worldwide outbreak in humans.

Replaying from the beginning revealed that the whole program was focused on an unexplained worldwide outbreak of lesions which affected nearly the entire population.

The development suggests that the government has not been fully candid with international health officials investigating a worldwide outbreak, who said they had not been informed of potential new cases in Beijing.

The move came in response to visitors' concerns at the time of a worldwide outbreak of influenza A (H1N1) ("swine flu").

Meanwhile, there is a worldwide viral outbreak that threatens to kill everyone except those who have been vaccinated.

He commands a Stryker company that is left behind in Iran to guard a U.S. military equipment depot after a worldwide outbreak of mutated bird flu.

If this were to happen, an influenza pandemic (worldwide outbreak of disease) could begin.

President Bush announced Tuesday that he would ask Congress for $7.1 billion to prepare the nation for the possibility of a worldwide outbreak of deadly flu.

A worldwide outbreak - due to the many visitors from all over the world - is imminent.

This could lead to a pandemic, or a worldwide outbreak of the illness.