A guide to whether Johnson & Johnson vaccine recipients should get a booster shot — and how they might do so. --NY Times

... 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.

The situation is murkier with J.&J.’s single-shot vaccine, which uses a more traditional virus-based technology. J.&J. has not received as much attention because only 8 percent of vaccinated Americans have gotten the shot. But that still covers 14 million people, and many of them want guidance. ...

Experts have long assumed that the government would eventually recommend a second shot. Last month, J.&J. announced internal research showing that second shots boost immune responses. Dr. Vivek Murthy, President Biden’s surgeon general, has signaled that regulators are likely to approve a second shot in the coming months. ...

Experts have long assumed that the government would eventually recommend a second shot. Last month, J.&J. announced internal research showing that second shots boost immune responses. Dr. Vivek Murthy, President Biden’s surgeon general, has signaled that regulators are likely to approve a second shot in the coming months. ...