Medical experts advise that people should get a vaccine for the bird flu when it becomes commercially available. One doctor said the most at-risk patients should be first.

Experts say no bird flu vaccine is needed for humans yet, as mild cases among dairy workers don't warrant it. The current H5N1 strain shows low human transmission risk and responds well to antivirals.

We last spoke in April, after a dairy worker became infected with bird flu. At the time, you described your level of concern about bird flu as “medium.” How would you describe your level of worry now?

As the bird flu outbreak grows, consumers may worry about that morning omelet and the flu's spread to humans. The big picture: Eggs sold at grocery stores remain safe for human consumption, according to the Food and Drug Administration,

As bird flu continues to ravage farms across the nation, fears have grown of bird flu starting a massive epidemic in humans.