Genes could be key to diagnosing Lyme disease, scientists say

Lyme disease is a bacterial infection caused by a tick bite. But the symptoms can present like those of other diseases, so a misdiagnosis can leave an infection to grow for years. That's why a breakthrough in diagnosing the disease is so important.

Recipient of transplanted heart meets family of organ donor

Miriam Nieves was part of a very special family reunion. The 62-year-old on Tuesday met the family of the donor who gave her a second chance at life. Miriam is the world's first HIV-positive-to-HIV-positive heart transplant recipient.