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This twelvemonth ’s flu snapshot lowers the chance of being hospitalized for flu by 35 % among high - risk group , data point relinquish by the Centers for Disease Control and Prevention ( CDC ) suggests .
The young data , published Oct. 3 in the CDC’sMorbidity and Mortality Weekly Report(MMWR ) , was pulled from five South American countries .
Data from South America hints that’s this year’s flu shot should lower high-risk groups' chance of hospitalization.
The Southern Hemisphere’sfluseason typically run between April and September , while the Northern Hemisphere ’s runs from about October to May . Because of this alternate timing , the northerly Hemisphere looks to Southern Hemisphere data to see which strains of flu virus are circulate , to plan the design of flu shots for the upcoming season , and to determine how well those vaccine will likely influence .
In the newfangled MMWR , research worker looked at the flu shot ’s effectiveness in Argentina , Brazil , Chile , Paraguay and Uruguay . The report focuses onpeople at high risk of terrible flu infection , let in young tike , older adult and people with condition such as continuing lung disease , liver disorders , heart disease or resistant - organisation problems .
Related : influenza shot have switch this year — here ’s why
Between mid - March and mid - July , these five countries report that more than 11,700 the great unwashed in these radical were hospitalized with grievous respiratory illnesses . Of these , about 3,850 tested positive for the influenza , with the vast absolute majority examination positive for an grippe A virus . ( Influenza A and grippe B are the two wide groups of flu computer virus that propagate seasonally , and in the study , two subtypes of influenza A stood out as prevalent : H3N2 , followed by H1N1 . )
The remaining 7,850 or so multitude in the written report tested negative for both flu andCOVID-19 , and they acted as a peak of comparability for the analysis . About 23 % of these patients had been vaccinated for the flu , compared with only 18 % of the group that terminate up hospitalize for the viral infection .
Crunching the numbers , the researcher found that the vaccine likely lowered the risk of flu hospitalization by 34.5 % . Breaking it down further , the guessing lowered the risk of infection of hospital care by intimately 59 % among grownup with medical conditions , 39 % for young youngster and 31 % for older adults .
" While only one in five [ severe acute respiratory infection ] patients had received the 2024 grippe vaccinum , those who were vaccinated were at significantly lower danger for hospitalization from any influenza computer virus infection , " the survey ’s authors concluded . These information suggest the flu injection was " effective in forestall around one third of influenza - have-to doe with hospitalizations among group prioritized for vaccination . "
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course in the Southern Hemisphere ’s flu season do n’t always accurately predict what will happen in the Northern Hemisphere . However , assuming the same flu computer virus strains circularise in the upcoming months , " health authority might counter similar levels of protective covering from the 2024 - 25 vaccinum , " the author wrote .
With a few elision , the CDC recommends thateveryone 6 months and olderget the annual flu vaccine . Additional measure , such as steady handwashing , can help slim the bedspread of flu . For those who do catch the grippe , have antiviral treatment , such as Tamiflu , as soon as possible can importantly thin the risk of infection of influenza - related complications .
This article is for informational purposes only and is not stand for to tender aesculapian advice .
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