Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-7pm ET on CNN.
The World Health Organization says the concern about the deadly virus MERS has "significantly increased," with hundreds of people potentially exposed in the U.S. alone. Can officials detect the disease before it's too late and begins to spread to others? CNN's Brian Todd investigates.
RELATED: Five things to know about MERS
Researchers were able to successfully grow human hair in bald places on mice. CNN's Senior Medical Correspondent Elizabeth Cohen tells Wolf Blitzer about what the promising breakthrough means for people.
Former President George W. Bush, known for having an active lifestyle, underwent a heart procedure in Dallas.
RELATED STORY: Bush undergoes heart procedure
CNN's Dr. Sanjay Gupta talks about new medication that doctors say may be the best treatment yet for leukemia.
RELATED STORY: New drug may be best treatment for leukemia yet
Supporters say the president's plan will create jobs and help scientists better understand how the brain works.
RELATED STORY: Brain map seeks to unlock mysteries of the mind Updated Wed March 6, 2013
A surrogate mother refuses to have an abortion after abnormalities were spotted on the ultrasound. CNN's Elizabeth Cohen reports.
Watch "The Situation Room with Wolf Blitzer" today during the 5pm ET hour for more on this story.
RELATED STORY: Surrogate offered $10,000 to abort baby
Dr. Sanjay Gupta goes to Massachusetts to get answers from the facility that made the contaminated injections.
RELATED STORY: Deaths rise to 12, with nearly 120 sickened in rare meningitis outbreak
(CNN) – Rep. Michele Bachmann responded Tuesday to a report that the presidential candidate frequently suffers from severe headaches that have at least three times landed her in the hospital.
At a campaign stop in South Carolina, Bachmann said she treats her migraines with medicine as needed and emphasized the rigorous pace of her campaign schedule since she entered the 2012 race.
SEE ALSO: Sanjay Gupta on Bachmann's headaches
The Situation Room with Wolf Blitzer is the command center for breaking news, politics and extraordinary reports from around the world. Tune in weeknights from 5-7pm ET on CNN.
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