Bluebird bio (NASDAQ:BLUE) shareholders had a great day today, with the stock up 32% on some early stage data for LentiGlobin from its HGB-205 study examining the drug as a treatment for beta-thalassemia major. Two patients in the trial have gone off blood transfusions, a new development that has investors excited about the treatment's potential.

So, is the stock a buy?

In the video below, fromĀ Market Checkup, the Motley Fool's health care-focused investing show, health care analysts Michael Douglass and David Williamson give their answer.

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David Williamson has no position in any stocks mentioned. Michael Douglass owns shares of Celgene. The Motley Fool recommends Celgene. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

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