Daniels’s rheumatologist thinks it was a result of the shots. Low bone mineral density (BMD), or osteopenia, can lead to osteoporosis, a condition in which bones become thin, brittle, and susceptible ...

The word osteopenia really means low bone mass. Well, what does that mean? Back in the early 1990s, the World Health Organization got together for the first time, and said how do we categorize people?