Create Account | Sign In: Author or Forum

Search Symptoms

Category: Family Medicine | Geriatrics | Gynecology | Infections | Internal Medicine | Critical Care | Emergency Medicine | Nursing | Pathology | Pharmacy | Pulmonology | Journal

Back to Journal Articles

Repeated Flu Vaccinations Help Prevent Severe Infection

Last Updated: January 08, 2018.

Vaccination for influenza for multiple seasons is twice as effective in preventing severe influenza -- compared with non-severe influenza -- in older patients admitted to hospital, according to a study published in the Jan. 8 issue of CMAJ, the journal of the Canadian Medical Association.

MONDAY, Jan. 8, 2018 (HealthDay News) -- Vaccination for influenza for multiple seasons is twice as effective in preventing severe influenza -- compared with non-severe influenza -- in older patients admitted to hospital, according to a study published in the Jan. 8 issue of CMAJ, the journal of the Canadian Medical Association.

Itziar Casado, M.D., from the Instituto de Salud Pública de Navarra in Pamplona, Spain, and colleagues assessed the effectiveness of vaccination in preventing influenza among community-dwelling adults (≥65 years) who were admitted to one of 20 hospitals for laboratory-confirmed influenza (130 inpatients with severe influenza and 598 inpatients with non-severe influenza). Cases were matched with inpatient controls by sex, age, hospital, and admission date (333 and 1,493 controls, respectively).

The researchers found that, compared with patients who were unvaccinated in the current and three previous seasons, adjusted effectiveness of influenza vaccination in the current and any previous season was 31 percent in preventing admission to hospital for non-severe influenza, 74 percent in preventing admissions to the intensive care unit, and 70 percent in preventing death. There was no significant effect on cases of severe influenza for vaccination in the current season only. There was a reduced risk of severe outcomes from influenza (adjusted odds ratio, 0.45) for vaccination in the current and any previous season.

"These results reinforce recommendations for annual vaccination for influenza in older adults," the authors write.

Abstract/Full Text


Previous: 2005 to 2015 Saw Fewer High School Students Having Sex Next: Charting Intervention Improves Geriatric Assessment Notes

Reader comments on this article are listed below. Review our comments policy.


Submit your opinion: