Nearly half of US reporting increase in COVID-19 cases

Experts are warning we're not out of the woods yet with much of the country seeing an increase in cases and deaths.
2:53 | 04/17/21

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Transcript for Nearly half of US reporting increase in COVID-19 cases
Now to the latest on the coronavirus pandemic. A grim milestone to report. The global death toll topping 3 million. That's about the population of Philadelphia and Dallas combined. This as the U.S. Has reached a major milestone in the race to vaccinate. More than 200 million shots administered. Nearly half of Americans over the age of 18 have received at least one dose of vaccine. More than 31% are fully vaccinated. But experts are warning we are not out of the woods yet with much of the country seeing an increase in cases and deaths. ABC's Reena Roy is at the javits center with the story. Good morning, Reena. Reporter: Eva, good morning to you. Officials say it is a race against the clock with variants spreading fast, even as vaccinations ramp up. This morning, fears of a fourth surge growing almost half the country battling a rise in covid-19 cases, deaths and hospitalizations also climbing. Nearly 38,000 patients fighting the virus coast to coast. Took me probably 36 hours before I finally got a set room. Reporter: 55-year-old John English speaking to us from his hospital bed as he battles covid in hard-hit Michigan. The infection rate the highest in the nation. It was very much like a war zone, a triage station. I've never seen -- almost like a natural disaster. Reporter: Health officials warning new variants could be to blame with the uk one now responsible for nearly half of all U.S. Cases. More dangerous variants are growing causing increases in cases with people without immunity. This increases the urgency for you to get vaccinated. Reporter: The race to vaccinate hitting a bump in the road. Johnson & Johnson's shots still on hold as scientists investigate rare blood clots in at least six women. Officials say the pause could last weeks. The recommendation from this group of independent experts for a continued pause will allow additional time to review any additional cases that might come in and for them to conduct a complete risk assessment. Reporter: Gordon broom says he contracted the virus six weeks after his second dose. I went to one dinner where nobody had masks on. I want to make sure that people realize that you can still get this virus, even if you've had your shots. Reporter: He spent five days in the hospital but believes it would have been a lot worse if he wasn't vaccinated. I would not be here if it wasn't for those two shots. I definitely think everybody should get the vaccine. Reporter: Now those are so-called breakthrough infections and have affected less than 1% of the fully vaccinated population here in the U.S. As for the Johnson & Johnson shot, a CDC advisory panel will be meeting Friday to potentially vote on a recommendation, whit. All right, Reena Roy for us, thank you so much.

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

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