There's a shortage of eggs in Australia, and it might not let up as we brace for the arrival of the H5N1 strain of bird flu. 

That strain has shown is can make the jump into humans. But how does it manage?

Also, menopause hormone therapy is in high demand. What are the benefits and the risks?

And with kids spending less time outside, short-sightedness is on the rise. But treatments are improving.