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U.S. data show rising 'breakthrough' infections among fully vaccinated

CoronavirusAug 24, 2021 02:30PM ET
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© Reuters. FILE PHOTO: People walk past a sign for a coronavirus disease (COVID-19) vaccination clinic in Los Angeles, California, U.S., August 17, 2021. REUTERS/Lucy Nicholson

By Julie Steenhuysen

CHICAGO (Reuters) - Some 25% of SARS-CoV-2 infections among Los Angeles County residents occurred in fully vaccinated residents from May through July 25, a period that includes the impact of the highly transmissible Delta variant, U.S. officials reported on Tuesday.

The data, published in the U.S. Centers for Disease Control and Prevention's weekly report on death and disease, shows an increase in so-called "breakthrough" infections among fully vaccinated individuals.

The CDC is relying on data from cohorts, such as the Los Angeles County study, to determine whether Americans need a third dose of COVID-19 vaccines to increase protection. Government scientists last week laid out a strategy for booster doses beginning on Sept. 20, pending reviews from the U.S. Food and Drug Administration and the CDC.

The new data released on Tuesday involved more than 43,000 reported infections among Los Angeles County residents aged 16 and older. Of them, 10,895, or 25.3%, occurred in fully vaccinated persons, 1,431, or 3.3%, were in partially vaccinated persons, and 30,801, or 71.4%, were in unvaccinated individuals.

The vaccines did, however, protect individuals from more severe cases. According to the study, 3.2% of fully vaccinated individuals who were infected with the virus were hospitalized, just 0.05% were admitted to an intensive care unit and 0.25% were placed on a ventilator.

Among the unvaccinated who fell ill, 7.5% were hospitalized, 1.5% were admitted to an intensive care unit and 0.5% required breathing support with a mechanical ventilator.

In addition to the LA County data, the CDC on Tuesday released an update on the HEROES cohort study among healthcare workers that showed a significant drop in vaccine effectiveness among vaccinated frontline workers in eight states who became infected with the coronavirus.

Vaccine efficacy during the period of the study when Delta was predominant fell to 66% from 91% prior to the arrival of the Delta variant, according to the report.

U.S. data show rising 'breakthrough' infections among fully vaccinated
 

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Comments (3)
Forex Harbingers
Forex Harbingers Aug 25, 2021 11:03PM ET
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Just a friendly reminder that this amazingly devastating virus is still under 2% in case to death ratio and less than 1/10 of 1% in population to death ratio. Have fun fretting that kills less than the flu, less than tuberculosis, less than many other viruses that we dont take any type of measures against beyond the typical.
Kelly Mayer
Kelly Mayer Aug 24, 2021 3:28PM ET
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oh it's gonna be a fun winter. Lockdown stocks here we go.
Felipe Daniel
Felipe Daniel Aug 24, 2021 2:56PM ET
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Why mandate vaccine passports when vaccinated are getting re-infected?
Me comment
Me comment Aug 24, 2021 2:56PM ET
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Because when infected cases mild,very low hospitalizations, few ICU patients and slim chance of death, all unlike what happens to the unvaccinated.
Chris Cummins
Chris Cummins Aug 24, 2021 2:56PM ET
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Felipe, did you read the article? The answer to your question is THIS article!
Vaska Sooo
Vaska Sooo Aug 24, 2021 2:56PM ET
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why do you care how the unvaccinated will go thru the infection? clearly says the vaccine doesn't work. have you seen vaccine adverse effects? I'll take my chances.
Vaska Sooo
Vaska Sooo Aug 24, 2021 2:56PM ET
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why do you care how the unvaccinated will go thru the infection? clearly says the vaccine doesn't work. have you seen vaccine adverse effects? I'll take my chances.
Alejandro Ca
Alejandro Ca Aug 24, 2021 2:56PM ET
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Reinfections don't matter if they are not getting really sick and being hospitalized. This is the purpose of the vaccine, to prevent serious illness, which it is doing, This will subsequently allow us to resume normal life without lock downs because eventually we won't care about getting COVID, it will be the same as the common cold (hopefully).
 
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