Influenza pressure’s disappearance, attributed to COVID protocols, alters 2024 flu shot : NPR

LEILA FADEL, HOST:

The flu shot is totally different this 12 months. The vaccine will probably be lacking a pressure of influenza it is protected in opposition to for greater than a decade, and that is as a result of that pressure has probably gone extinct, due to COVID-19. Well being and science reporter Sarah Boden explains.

SARAH BODEN, BYLINE: Again in 2020, the COVID virus managed to unfold to each nook of the world regardless of all of the isolation and masking. An unintended consequence of that unusual, lonely 12 months is a pressure of flu often called B/Yamagata appears to have disappeared.

KEVIN R MCCARTHY: Early – halfway by 2020, individuals had been realizing that you just weren’t seeing sequences. And I did not consider it at first, and I do not suppose lots of people believed it.

BODEN: Kevin R. McCarthy research the coevolution of viruses on the College of Pittsburgh’s Middle for Vaccine Analysis. He says what occurred with B/Yamagata was an enormous shock. And whether it is really gone, this would be the first documented occasion of a virus going extinct just because individuals stayed away from one another. So social distancing can stamp out a virus, simply not COVID. Now, there have been a few issues working in opposition to B/Yamagata. For one, the pressure of flu hasn’t been round for many years, so there was inhabitants immunity. Additionally, it was in competitors with one other flu virus.

MCCARTHY: So the B/Yamagata pressure co-circulates with type of its twin, B/Victoria. And for the previous few years, the Victoria lineage was successful the battle of world domination.

BODEN: Since B/Yamagata hasn’t been seen for years, the Meals and Drug Administration stated it is time to pull it from the annual flu shot. That is the fitting name, says Kawsar Talaat, an infectious illness doctor at Johns Hopkins Bloomberg College of Public Well being.

KAWSAR TALAAT: When you embody a pressure for which you do not suppose anyone’s going to get contaminated right into a vaccine, there are some potential dangers and no potential advantages.

BODEN: …Even when these dangers are infinitesimally small. The absence of B/Yamagata will not change the expertise of getting this 12 months’s flu shot, and unvaccinated persons are no much less prone to get sick. Different strains of influenza are nonetheless circulating, and hundreds of People die yearly due to it. However Talaat says this variation to the vaccine simplifies manufacturing, which makes it simpler to provide extra doses. And that is good for everybody.

For NPR Information, I am Sarah Boden.

Copyright © 2024 NPR. All rights reserved. Go to our web site phrases of use and permissions pages at www.npr.org for additional info.

NPR transcripts are created on a rush deadline by an NPR contractor. This textual content is probably not in its remaining kind and could also be up to date or revised sooner or later. Accuracy and availability could range. The authoritative file of NPR’s programming is the audio file.