For example, a flu strain is a certain biological form of the influenza or flu virus.

The H1N1 form of swine flu is one of the descendants of the strain that caused the 1918 flu pandemic.

H7N9 is a bird flu strain of the species Influenza virus A (avian influenza virus or bird flu virus).

So that's why every year you can catch a slightly different strain of flu.

Many references to bird flu and H5N1 in the popular media refer to this strain.

This year's swine flu strain grew very poorly in early production basically .6 doses per egg.

We need rapid diagnostics so that we can tell if somebody has a strain of flu which we have only identified very recently.

A bird adapted strain of H5N1, called HPAI A(H5N1) for highly pathogenic avian influenza virus of type A of subtype H5N1, is the highly pathogenic causative agent of H5N1 flu, commonly known as avian influenza ( bird flu ).

Think of cancer, of bird flu, swine flu, SARS.

Strain

Something of a strain.

Just look at pandemics swine flu, bird flu, H1N1.

That's the sound of genetic mutations of the avian flu becoming a deadly human flu.

As variable as flu is, HIV makes flu look like the Rock of Gibraltar.

Bird flu.

Make a strain.

HlV makes flu

like swine flu.

Why the flu?

And that most people who die of regular flu which in regular flu years is about 360,000 people worldwide, most of them senior citizens and they die not of the flu but because the flu gives an assault to their immune system.

And that most people who die of regular flu which in regular flu years is about 360,000 people worldwide, most of them senior citizens and they die not of the flu but because the flu gives an assault to their immune system.

Swine Flu for Grownups

Take your time. Don't strain.

We tried it against flu A viruses H1N1, H3N2 as well as flu B viruses.

We tried it against flu A viruses H1N1, H3N2 as well as flu B viruses.

Special event on the theme of Avian flu

Who Pays for Bird Flu?

Special event on Avian flu

As variable as flu is,

So this, swine flu pink.

Everybody's down with the flu.

A strain of this bacterium was grown in space.

Think of the strain involved by his prodigious feat.

People do such things under the strain of necessity.

Strain in the German German relationship.

Not while I'm under this strain.

Now don't strain yourself, Will Mossop.

I was vaccinated against the flu.

SB I think flu is different.

Yet freedom of speech in the West is under strain.

The Russian strain of political messianism is pretty much exhausted.

Be careful, it's heavy. Don't strain anything.

I used it to strain the spaghetti.

The flu also revealed some of Mexico s other fundamental flaws.

Instead of tuberculosis we now have retroviruses and avian flu.