Name: What’s the difference between a heart attack and cardiac arrest?
Uploaded: Mon Nov 09 2020 15:56:55 GMT+0000 (UTC)
Duration: 4 min 31 s
Description: NBC News medical contributor Dr. John Torres joins Hoda and Jenna to discuss the announcement by the drug company Pfizer that its COVID-19 vaccine candidate is over 90% effective. Plus, he shares information about the difference between a heart attack and cardiac arrest, and the symptoms to be aware of.

Nov. 9, 202004:31