New study says 800,000 Americans die or are disabled by misdiagnoses each year — but there are 3 simple questions to ask to lower your risk

• Nearly 800,000 Americans suffer permanently or die each year when doctors make diagnostic errors.
• Only five diseases make up more than one-third of the cases, which could help fix the problem.
• One researcher called it "the most under-resourced public health crisis we face."

The number of Americans who suffer permanent consequences from medical misdiagnoses is higher than previously thought, according to a new study, but there are some simple steps you can lower your risk.