KEY POINTS
  • CDC scientists say their investigation into a rare blood clotting issue linked to the J&J Covid-19 vaccine has identified 28 cases.
  • The median age of the patients was 40, ranging from 18 to 59 years old.
  • Women who were 30 to 39 years old accounted for the biggest risk group.
The Johnson & Johnson Janssen Vaccine

CDC scientists say their investigation into a rare blood clotting issue linked to the Johnson & Johnson Covid-19 vaccine has identified 28 people who developed the potentially life threatening blockages — three of whom have died.

The Food and Drug Administration and Centers for Disease Control and Prevention on April 13 asked states to temporarily halt using J&J's vaccine "out of an abundance of caution" while it investigated six women, ages 18 to 48, who developed cerebral venous sinus thrombosis, or CVST, in combination with low blood platelets within about two weeks of receiving the shot.