Unlike the Covid-19 vaccines currently in use, Johnson & Johnson’s relies on technology that has been tested for years. Ahead of the Tokyo Olympics, some countries are pushing their athletes to the front of the line for shots.

Here’s what you need to know:

• Biden administration officials tried to tamp down expectations for supplies of the Johnson & Johnson vaccine.

• Johnson & Johnson has planned trials of its vaccine that will include infants.

• Here is how Johnson & Johnson’s vaccine differs from Pfizer’s and Moderna’s.

• Fauci skewered, an underwear mask: Among the pandemic skeptics at CPAC.

• Gov. Beshear of Kentucky says his state is leading in the rush to vaccinate teachers.

• The impact of the storm in Texas could lead to more virus cases, experts say.

• After harsh criticism, Israel says it will vaccinate Palestinians who hold work permits.

• Some Olympians are being placed in a risky new event: vaccination line jumping.