Parents in the United States who want to vaccinate their young children against Covid-19 this fall may face a growing set of ...

“We’ve stepped back into the world that we lived in before the [CDC’s vaccine advisory committee] was created,” said Dr.

It's important to note, however, that Pfizer's vaccine requires two doses administered several weeks apart to reach 95% efficacy. So 100 million doses would vaccinate half the number of people.

The top public health officials during Trump's first term praised mRNA vaccines. In the second term, officials seem to be ...

They’re turning their backs on a technology thought to have saved millions of lives—with the potential to save many more.