U.S. is seeing elevated danger of dengue infections, well being officers warn : NPR

ARI SHAPIRO, HOST:

It has been a record-breaking yr for dengue instances in Central and South America – virtually 10 million instances thus far, greater than any yr on report. The Facilities for Illness Management and Prevention is now warning of an elevated danger of dengue infections within the U.S. NPR well being correspondent Pien Huang is right here to inform us about it. Hey, Pien.

PIEN HUANG, BYLINE: Hey, Ari.

SHAPIRO: Any concept why the virus is surging now?

HUANG: So a few causes. No. 1, it is a mosquito-borne virus. And it has been a heat, moist yr in South America, so there’s much more mosquitoes round. Mosquitos are additionally thriving in additional locations due to local weather change, in order that’s No. 1. No. 2 is that dengue is cyclical. There are typically massive outbreaks each couple of years. The final massive one was in 2019. And a part of the explanation for that’s that there is really 4 completely different strains of dengue. Individuals who get one pressure are protected for a few years, then the immunity wears off they usually’re vulnerable to getting one of many different strains. So this population-level immunity comes and goes in cycles. After which there’s additionally the truth that folks within the U.S. are touring much more nowadays.

SHAPIRO: Lately which means, like, summer time trip? Or simply broadly, typically talking, folks journey extra?

HUANG: Positively much more because the pandemic. So I spoke with Gonzalo Vazquez-Prokopec, an environmental scientist at Emory College. He says we won’t simply blame the mosquitoes.

GONZALO VAZQUEZ-PROKOPEC: Human mobility, both brief or longer distances, play a big function in transferring the viruses round. So people are the vector. People are those which can be transferring the virus even an extended distance than mosquitoes.

HUANG: He says one of many the reason why issues went fairly quiet within the final couple of years is that journey principally shut down through the COVID pandemic. So now that individuals are touring extra typically – seeing household, outdated buddies, locations they have not been – they’re getting bitten by mosquitoes with dengue, they usually’re bringing it to wherever they are going subsequent.

SHAPIRO: So how dangerous is it? I’ve a way that, like, you’d slightly get dengue than malaria, however you do not wish to get dengue.

HUANG: Nicely, dengue is definitely one of many world’s commonest mosquito-spread illnesses. And in 75% of the instances, the individuals who get contaminated do not really get very sick.

SHAPIRO: Nicely, that is good.

HUANG: Yeah, that is good. However in 1 / 4 of these instances, they do, and people signs might be fairly terrible, Ari. Individuals can get excessive fevers, debilitating complications, joint pains. And in some extreme instances, it might probably trigger folks’s blood vessels to leak, and it might probably result in shock and even demise.

SHAPIRO: Not good. OK, I mentioned the CDC is warning about danger in the US. How extreme is that danger? Who needs to be nervous?

HUANG: Yeah, so it actually is dependent upon the place you reside. The chance just isn’t unfold equally throughout the nation. Up to now this yr, there have been about 2,000 instances within the U.S. and most of these instances have been in Puerto Rico, the place dengue is endemic. Puerto Rico really declared a public well being emergency over dengue a couple of months in the past. There have additionally been some instances reported within the U.S. Virgin Islands, some in Florida. In recent times, native transmission has been seen in Texas, Arizona, California.

Gabriela Paz-Bailey, head of CDC’s dengue department, says that individuals who traveled to Puerto Rico or different locations which can be experiencing massive dengue surges ought to concentrate on the chance. It is particularly harmful for infants, pregnant girls and the aged. However she says that they don’t seem to be really anticipating massive surges of dengue throughout the continental U.S. the summer time. What they do count on to see is extra travel-related instances and small chains of transmission associated to them. She says that they really need medical doctors to be looking out for instances and to check for it.

SHAPIRO: NPR’s Pien Huang. Thanks.

HUANG: You are welcome.

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