The recent recommendation by the FDA and CDC to put a pause on administration of the Johnson and Johnson COVID-19 vaccine was done in an abundance of caution after rare reported cases of blood clots. There have been six reported incidents, all were in women between the ages of 18 and 48, and the symptoms developed 6-13 days after vaccination.
There is an emergency meeting of the American College of Immunization Practices scheduled for Wednesday, April 14th, presumably to address these concerns. Until we have further information, there is no recommendation to do any special testing if you or your child has received this vaccine.
An individual who has received the Johnson & Johnson COVID-19 vaccine develops symptoms of a blood clot: severe leg pain, severe abdominal pain, severe chest pain, shortness of breath, slurred speech, drooping or asymmetrical use of facial muscles, or loss of consciousness should seek emergency medical care.