The ongoing influenza epidemic is characterized by intense activity with most influenza infections due to the A (H3N2) viruses. Using the screening method, mid-season vaccine effectiveness (VE) in preventing influenza-like illness in primary care was estimated to 32% (95% CI; 23 to 40) among risk groups and was 11% (95% CI; -4 to 23) among the elderly (e 65 y). The VE in e 65 y was the lowest estimate regarding the 4 previous seasonal influenza epidemics.
Auteur : Souty C, Blanchon T, Bonmarin I, Levy Bruhl D, Behillil S, Enouf V, Valette M, Bouscambert M, Turbelin C, Capai L, Roussel V, Hanslik T, Falchi A
Human Vaccines & Immunotherapeutics, 2015, vol. 11, n°. 7, p. 1621-5