Can COVID-19 vaccines reduce transmissibility of the virus?

Dr. Ashish Jha, dean of the Brown University School of Public Health, discusses the latest on coronavirus.
2:15 | 12/27/20

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Transcript for Can COVID-19 vaccines reduce transmissibility of the virus?
Zohreen, thank you so much. Let's bring in Dr. Ashish jha Dean of the brown university of public health. Dr. Jha, thank you for being here this morning. We know vaccines can stop symptoms. Can they reduce transmissibility of the virus? Good morning and thanks for having me on. We don't know for sure. All the evidence so far suggests it probably does. I doubt it's 100%. My best guess based on the data, if you get vaccinated, your chances of transmitting the disease probably does go down We've seen new variants of the virus in uk. They're also showing up in France, Canada and other countries. How concerned are you about this? I'm pretty concerned about this. You know, we're already at a breaking point in so many places. California, Texas, other places really stretched. If that variant, which I suspect is probably here in the U.S., really takes off, it's more contagious. We'll see more infections. I'm worried about our hospitals. Dr. Jha, the vaccine as far as we know, works against the new variant of the virus. If there are more new variants, could the vaccine eventually not work? Yeah, I think it's a possibility. I think the current vaccine does work against this variant. We don't know for sure. It's such a fast-moving thing we're learning. I suspect it will work for a while. If it doesn't, we'll have to make changes to the vaccine which will delay things further. I remain reasonably hopeful the vaccine continue to work for us for a while. With so many people traveling around the holidays, we saw the jump in cases after Thanksgiving. Now with Christmas and new year's travellers, how serious is this? I've heard it called a surge on a surge on a surge. I'm very worried about this. I totally get why people travel. It's hard to not see family over theays. I'm worried. If you're still traveling, minimize gatherings. The next few weeks are going to be very hard based on infections as well as hospitalizations. Pretty concerned about the next few weeks ahead. Dr. Jha, thank you so much for joining us. Dan, over to you.

This transcript has been automatically generated and may not be 100% accurate.

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