Increasing certainty in flu vaccine effectiveness
According to CDC data, studies are getting better at estimating the influenza vaccine effectiveness. With the 2017-2018 flu season still going on in the USA, there are already some indication that vaccines have some effectiveness (although its target strains were mismatched). The CDC reports how it measures vaccine effectiveness here and I was interested in their confidence intervals (the interval that takes into account uncertainties to extrapolate to the broader, unknown population). ...