Many old buildings at a New York City hospital are in ruins, but it played a key role in the battle against tuberculosis, which killed 5.6 million people in the U.S. in the first half of the 20th century.
Early in the pandemic, scientists began testing an old TB vaccine against the coronavirus. But the trial enrolled fewer participants than expected as new Covid vaccines were introduced, and no discernible effect was found.
The B.C.G. vaccine, more than a century old, has shown some promise against diabetes. The university’s move left parents and outside investigators concerned.