Allison Lint News Today

This weeks human factor. dr. sanjay gupta introduces us to a young violinist who overcame a rare disease and helped others by raising awareness. ♪ >> reporter: allison lint began playing the violin at 16 years old. this week, she started to feel exhausted and then had difficulty breathing. >> i couldnt perform everyday tasks. i couldnt remember how to dial the phone. >> reporter: she was misdiagnosed with bronchitis and pneumonia and then rushed to the hospital coughing up blood from a lung he...