Another dangerous strain of flu has claimed a life and Georgia’s numbers continue to climb. There’s no vaccine, so what can you do to stay healthy and flu-free?

For influenza viruses, imperfection is a strength. They constantly mutate, producing new strains that challenge immune systems primed to fight earlier varieties. That’s what makes flu a life-long threat to humans and the animal species — mainly birds — that are vulnerable to it.

The national spread of the disease has alarmed public health officials, who remain concerned it could spread to humans on a large scale.