Open Accessibility Menu

Johnson & Johnson Vaccine Information

Johnson & Johnson Vaccine Information

The Centers for Disease Control and Prevention (CDC) has recommended an immediate pause on the use of the single-dose Johnson & Johnson (Janssen) COVID-19 vaccine due to a very few reported cases where adverse effects occurred. Presently, these events appear to be extremely rare, about 1 case per 1 million vaccine doses.

This action is not a mandate. According to FDA officials doctors and patients may use the vaccine if they determine that its benefits outweigh its risks in individual cases. However, due to the possible significance of these events, the CDC Advisory Committee on Immunization Practices will meet Wednesday, April 14, to review data and assess the situation further. The FDA will then review the committee’s analysis and recommendations while investigating these cases. As of April 12, more than 6.8 million doses of the J&J vaccine have been administered across the United States, the vast majority with no side effects or very mild side effects.

  • At this writing, six cases of potentially significant adverse events have been reported in the United States, which may be related to the J&J vaccine.
  • All six cases involve women between the ages of 18 – 48.
  • Symptoms occurred six – 13 days after vaccination.
  • The subject individuals developed a rare and severe type of blood clot, called cerebral venous sinus thrombosis (CVST), after receiving the J&J vaccine.
  • CVST requires a distinctly different treatment than other types of blood clots. Specifically, heparin or heparin derived drugs (e.g. lovenox) should not be used.
  • CVST was seen in veins that drain blood from the brain and occurred in combination with low levels of blood platelets.
  • Many people who get a COVID vaccine will experience mild symptoms such as tiredness, headache, muscle pain, chills, fever or nausea within a day or so of getting the shot. These side effects are common, expected and usually last only a few days. However, the CDC and FDA recommend that people who received the J&J vaccine should contact their doctors if they experience any of these symptoms within three weeks of vaccination:
    • Severe headache or blurred vision
    • Abdominal pain
    • Leg pain or swelling
    • Shortness of breath
    • Chest pain
    • Any symptoms suggestive of stroke such as – facial drooping or weakness, weakness of arm or leg on one side of body, vision changes
    • Seizure

For more information, talk to your doctor or go to the CDC website:

Or, visit the OU Health COVID-19 website: