One Dose and Variant-Tested: The J&J Covid-19 Shot Explained

Johnson & Johnson’s Covid-19 shot will be a valuable addition to the arsenal of vaccines that could get the world closer to herd immunity.

Health leaders expect the Food and Drug Administration to green-light the shot, which will become the first single-dose Covid-19 vaccine available in the U.S. It will be a huge asset to boosting vaccine rates by increasing supply and ensuring people can get fully immunized without having to go back for a second shot.

1) How is J&J’s vaccine different from the other shots?

The biggest difference between the J&J shot and the vaccines by Moderna ...