The have been vaccinated against the flu, is an effective measure in the prevention of hospitalizations due to this virus in people older than 65 years. So concludes a multicenter study coordinated by scientists at the Biomedical Research Centre Network for Epidemiology and Public Health (CIBERESP), led by Angela Dominguez, of the University of Barcelona.
The work, published in the journal Eurosurveillance, which evaluated the effect of vaccination in preventing hospitalization of older people in two seasons of influenza-like illness (2013-2014 and 2014-2015), was ranked the effectiveness of the vaccine to prevent frames that require hospitalization generally at 36%, with differences depending on the existence of medical conditions in high-risk patients, the age or the subtype of the virus.
In patients without other medical risk conditions, the fact of having been vaccinated was a factor highly determining factor in the prevention of the income. The effectiveness of the vaccine was 51% for these patients, versus 30% effectiveness that was recorded for patients who had one or more of these risk conditions –lung disease, cardiovascular disease, diabetes, chronic renal failure, hemoglobinopathies, immunodeficiency, neurological disease and obesity.
there are Also differences between the effectiveness of the vaccine in different age groups. The utility of the same in preventing revenue due to influenza in patients between 65 and 79 years old (39%) was higher than in individuals from the age of 80 (34%).
The study also revealed differences in the effectiveness of the vaccine to prevent hospitalization in older people depending on the strains of the virus. The effectiveness was higher for subtype A (H1N1) pdm09 (49%) than for subtype A (H3N2) (26%).
This multicenter study, which ran between December 2013 and march 2015 in a total of 20 Spanish hospitals in 7 Spanish autonomous communities, included data from a total of 728 patients 65 years or older hospitalized for flu, and a control group of 1.826 individuals who are hospitalized for other causes.
getting the flu vaccine, the preventive measure most appropriate
“The vaccine against influenza is the most appropriate to prevent the morbidity and mortality associated with yearly epidemics of influenza,” notes Angela Domínguez, coordinator of the study and deputy director of CIBERESP, who insisted that “the results demonstrate that influenza vaccination is effective in preventing hospitalizations in older patients”.
The annual epidemics of influenza in the world derive at a figure that fluctuates between 3 and 5 million cases of severe illness, and between 250,000 and 500,000 deaths. In older patients, and especially those with comorbidities, there is a greater risk of complications from this virus will require hospitalization.
Studies conducted in the united States revealed that 89% of the deaths associated with the flu were in people older than 65 years, and that 11% of deaths in older people during periods of peak influenza were attributable to this virus.