Stephen Krahling was a published cancer researcher when vaccine maker Merck brought him on board as a virologist in 1999. That’s when he says he found himself embroiled in an all-hands-on-deck ...

"If someone is fully vaccinated against measles (two doses) and has not had a major immunocompromising condition occur (e.g., ...

Scientist Stephen Krahling worked on a project at Merck called “Protocol 7” and was uniquely positioned to blow the whistle on what he learned.

As the measles outbreak in Texas spreads, attention is turning to what is commonly called the MMR vaccine. (Eric Risberg / AP) As the measles outbreak in Texas spreads, attention is turning to ...