What are the Bad Side Effects of the Johnson & Johnson Vaccine?
While most side effects from the Johnson & Johnson (Janssen) COVID-19 vaccine are mild and temporary, there are certain rare but serious side effects that warrant immediate medical attention.
Understanding Serious Side Effects of the Johnson & Johnson Vaccine
Serious side effects from the Johnson & Johnson (Janssen) COVID-19 vaccine are rare, but it's crucial to be aware of the signs that require immediate medical attention. These symptoms typically indicate a more significant issue, such as a rare blood clot disorder (Thrombosis with Thrombocytopenia Syndrome or TTS), or other concerning conditions.
When to Seek Medical Attention
If you or someone you know recently received the Johnson & Johnson vaccine and develops any of the following symptoms, it is important to seek medical care right away:
- Severe, persistent headache or blurred vision: These could be indicators of blood clots in the brain.
- New neurologic symptoms: Any sudden and unexplained changes in sensation, movement, or cognitive function.
- Persistent abdominal pain: Abdominal discomfort that is severe and does not go away could signal internal issues.
- Shortness of breath or chest pain: These are critical symptoms that could suggest a blood clot in the lungs or heart-related concerns.
- Leg swelling: Swelling in one or both legs, especially if accompanied by pain or redness, might indicate a deep vein thrombosis (DVT).
- Recent bruising or pinpoint-like rash: Unusual bruising or small, red, pinpoint spots on the skin (petechiae) could point to a clotting or bleeding disorder.
These concerning symptoms are distinct from common, mild vaccine side effects like arm soreness, fatigue, muscle aches, or fever, which usually resolve within a day or two. If any of these serious symptoms appear, especially within one to three weeks after vaccination, do not delay in contacting a healthcare professional.
For more information, you can consult resources such as the Johnson & Johnson Vaccine Use/FAQs.
