FDA approves Merck's drug for rare, deadly lung condition

The approval is a win for Merck, which is working to diversify its revenue stream as its blockbuster cancer drug Keytruda nears a loss of market exclusivity.

FDA approves Merck's drug for rare, deadly lung condition
The approval is a win for Merck, which is working to diversify its revenue stream as its blockbuster cancer drug Keytruda nears a loss of market exclusivity.