Vaccines

... Should people who received the single-shot Johnson & Johnson Covid vaccine be getting a booster shot?..

The question of booster shots for the other two vaccines being used in the U.S. — the double-shot vaccines from Moderna and Pfizer, which are both based on genetic technology known as mRNA — has received more attention. Many experts believe that at least immunocompromised people and older adults are likely to benefit from a third shot.

President Biden’s new coronavirus vaccine mandates will have sweeping ramifications for businesses, schools and the political discourse in the United States. But for many scientists, the question is a simpler one: Will these measures turn back a surging pandemic?

The answer: Yes, in the longer term.

It has become clear that the nation cannot hope to end the pandemic with some 37 percent of Americans not having received a single dose of Covid vaccine, several experts said in interviews. Cases and hospitalizations are only expected to rise as Americans move indoors in homes, schools and offices in the cooling weather.

The administration’s new plan should stem the flood of infections and return the country to some semblance of normalcy over the longer term, the researchers said.

“It’s going to fundamentally shift the arc of the current surge,” said Dr. Ashish Jha, dean of Brown University School of Public Health. “It’s exactly what’s needed at this moment.”