Delta variant accounts for 10% of new COVID-19 cases in US

Health officials are concerned as vaccination rates slow down and hospitals see an increase in very sick young people.
2:36 | 06/20/21

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Transcript for Delta variant accounts for 10% of new COVID-19 cases in US
Tonight, concerns about the delta variant, accounting for at least 1 in 10 new covid cases in the U.S. Hospitals are seeing younger patients, and experts are telling pregnant women anyone who has not been fully vaccinated is at increasing risk and should continue to mask up. Here's Trevor Ault. Reporter: Tonight, the delta variant now detected in nearly every state, and front line hospital workers growing concern for people who still aren't vaccinated. The patients I'm seeing now are either young people who never believed they would get sick, young pregnant women who were afraid of the vaccine, and now they're having symptoms, hypoxia, and their babies are in danger. Reporter: This week, the CDC estimating pregnant women were less than half as likely to be fully vaccinated than non-pregnant women as of early may. But vaccine hesitancy is a problem for enre regions. Tragically, we're still -- we're now two covid nations, because as good as we're looking in the northeast and in California and in a few other states, in the south things are looking very dire. Reporter: The darker part of this map showing much of the south and even parts of the west, where vaccination rates are lowest, will be particularly vulnerable to the delta variant. But with summer camps ramping up, many parents across the country are torn about easing restrictions. On one hand, we want everything to go back to normal. We want the kids to feel like they can be kids. On the other hand, are we just moving too quickly? Reporter: Health officials are now reaching out to underserved groups. Here in Denver, a nonprofit holding dozens of pop-up clinics targeting the Latino community. In English, we would say, come and get your vaccine. Don't be afraid. Reporter: And in Texas, Houston father of two Allen Herrera serving as a reminder of the ongoing threat. I didn't know what was going to happen. And I just told my wife that I love her. Reporter: He spent nearly six months in the hospital, undergoing a double lung transplant. But this father's day he's back home with his family. It means everything to me and the boys to have him back. I didn't bring my kids into this world for me not to be in it. To be able to celebrate father's day with them, it's a dream come true. Reporter: And linsey, another sign of states easing restrictions. Tonight there will be a packed crowd inside here at Madison suare garden for a foo fighters concert. It's the first show since the start of the pandemic. Everyone attending will have to prove they're fully vaccinated. Trevor, thank you.

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

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