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The latest ed. of The Lancet (Infectious Diseases) reports on the new WHO guidelines on the influenza vaccine. They now recommend that the quadrivalent vaccine should no longer contain the influenza B/Yamagata strain as it is no longer being detected in circulation. It's suggested that the non pharma logical interventions introduced for Covid 19 may have effectively stopped the wild type virus spreading. They say, "This would represent the first time that an influenza virus has been eliminated from the human population through NPIs."
The edition also discusses developments in searching for a universal influenza vaccine.
They also report on the effectiveness of the monovalent Covid 19 vaccines, suggesting they are less effective than the older bivalent formulations, there is also so info on cost effectiveness of vaccination.
Remember you can sign up for free (limited) access to the Lancet.
https://doi.org/10.1016/S1473-3099(23)00366-3
https://doi.org/10.1016/S1473-3099(23)00697-7
https://doi.org/10.1016/S1473-3099(23)00424-3
The edition also discusses developments in searching for a universal influenza vaccine.
They also report on the effectiveness of the monovalent Covid 19 vaccines, suggesting they are less effective than the older bivalent formulations, there is also so info on cost effectiveness of vaccination.
Remember you can sign up for free (limited) access to the Lancet.
https://doi.org/10.1016/S1473-3099(23)00366-3
https://doi.org/10.1016/S1473-3099(23)00697-7
https://doi.org/10.1016/S1473-3099(23)00424-3