WebMD brought together experts from four federal agencies to talk prevention, monitoring, and what the “what ifs” of bird flu might look like.

Estimates show that by 2040, age-related macular degeneration may affect nearly 300 million people worldwide. And we are very limited in our ability to treat or prevent it. Here's what to know.

Colorectal cancer cases increased a whopping 333% among 15- to 19-year-olds and 185% among 20- to 24-year-olds from 1999 to 2020.

The virus variant that is circulating among cattle is not an efficient cause of disease in humans. There may be more concern if H5N1 passes to pigs, because their viral receptors are closer to those in humans.

Cow udders have the same receptors for flu viruses as humans and birds, raising concerns that cows could become “mixing vessels” that help the bird flu virus spread between people.

Estimates show that by 2040, age-related macular degeneration may affect nearly 300 million people worldwide. And we are very limited in our ability to treat or prevent it. Here's what to know.