The hope is to develop a vaccine that could give lifelong protection against a majority of flu viruses, including bird flu.

VOA: special.2009.03.04

Federal health officials said they expect a vaccine for the H1N1 flu to be available by the middle of October.

VOA: special.2009.08.13

W.H.O.special adviser Keiji Fukuda reported earlier this month that the virus has acted in some ways like seasonal flu.

VOA: special.2009.11.24

Right now,as schools prepare to begin a new year, one concern is the H1N1 virus, often called swine flu.

VOA: special.2009.08.13

In the United States, cases of suspected influenza are at higher numbers than usual this early in the flu season.

VOA: special.2009.11.24

W.H.O.special adviser Keiji Fukuda said last week that the virus has continued to act in some ways like seasonal flu.

VOA: special.2009.11.11

But last week, two teams working independently reported a discovery that could help lead to a universal flu vaccine.

VOA: special.2009.03.04

You could be placed in medical isolation if someone you traveled with on a plane is suspected of having swine flu.

VOA: special.2009.07.14

These urge local officials to balance to risk of flu in their communities with the problems that school dismissals could cause.

VOA: special.2009.08.13

They were barred from leaving their rooms because someone on their flight was suspected of having the flu.

VOA: special.2009.07.14

As of Tuesday, seventy-three countries had reported more than twenty-six thousand cases of the new H1N1 flu virus.

VOA: special.2009.06.10

Viruses change,or mutate, so flu vaccines must be reformulated each year to target the most common threats.

VOA: special.2009.03.04

But public health officials point out that flu viruses can return more aggressively after a few months.

VOA: special.2009.05.06

And,unlike seasonal flu, younger people have suffered many of the serious cases and deaths from the virus.

VOA: special.2009.11.24

Since April,more than one thousand deaths have been reported from the H1N1 virus, commonly called swine flu.

VOA: special.2009.08.05

But the new H1N1 flu has been affecting a younger age group than seasonal flu epidemics.

VOA: special.2009.08.05

The United States declared a public health emergency to permit the use of federal money and the use of flu medicines in federal storage.

VOA: special.2009.04.29

But so far the virus has not shown itself to be more severe than seasonal flu.

VOA: special.2009.08.05

The H1N1 flu virus that has spread around the world is especially risky for pregnant women.

VOA: special.2009.08.05

An unusual number of flu cases have been found in young people who were otherwise healthy.

VOA: special.2009.06.10

The most common seasonal flu virus found in the United States this year is type A(H1N1).

VOA: special.2009.03.04

And,unlike seasonal flu, younger people have suffered many of the serious cases and deaths from H1N1.

VOA: special.2009.11.11

Doctor Fry says it is better to prevent the flu than to have to treat it.

VOA: special.2009.03.04

Doctor Fukuda, the agency's top flu expert, says the virus continues to spread in North America.

VOA: special.2009.06.10