The U.S. is recommending a “pause” in administration of the single-dose Johnson & Johnson COVID-19 vaccine to investigate reports of rare but potentially dangerous blood clots.

In a joint statement Tuesday, the Centers for Disease Control and Prevention and the Food and Drug Administration said they were investigating clots in six women that occurred in the days after vaccination. The clots were observed along with reduced platelet counts - making the usual treatment for blood clots, the blood thinner heparin, potentially “dangerous.”

Dr. Sharon Nachman joined News 12's Doug Geed this morning to answer questions about the vaccine:

How common is this to happen to a vaccine after it is approved for emergency use?

What is next? Who is at risk of these blood clots?

For those people that already got the Johnson & Johnson shot, what side effects should they be looking for?