Sentence examples for flu strains from inspiring English sources

At the moment there are three seasonal flu strains circulating.

Why was it different from other flu strains?

Neuraminidase is the "N" in the names of flu strains.

Genetic research suggests that all flu strains originated from birds.

The H1N1 virus itself grows more efficiently than some past flu strains.

The inspections are designed to look for avian flu strains in poultry.

Since 1997, avian flu strains seem to have infected thousands of birds in 11 countries.

What the team found was alarming: new bird flu strains had emerged.

Since 1997, avian flu strains have killed millions of birds in nearly a dozen countries.

The swine flu is type A, but so are many seasonal flu strains.

Asian flu strains can enter North America through Alaska, study finds.