Btw, that efficacy number gets repeated using different terms. But if you read the CDC’s actual statement it says 40% efficacy in preventing hospitalization, not ‘illness’.If you're coughing you're more likely to spread the virus. For reference the time I got the most sick from the flu I got it from someone who showed no symptoms until 48 hours after I had contact with them. So...
40% is the reported average.
Even if we assume 16% is correct, shit, let's say 10%. If I told you "Hey, this vaccine will make it 10% less likely you get an illness that sucks and there's no downside." what rational case can be made against it?
A meta-analysis of data from five seasons (2010-2014) estimated VE of 41% (95% CI, 34-48) for prevention of flu hospitalizations in adults aged 18 years and older and VE of 51% (95% CI, 44-58) among adults aged 18-64 years. These results suggest that vaccination decreased the risk of severe flu by half in this age group and by one-third among older adults [43].
How Flu Vaccine Effectiveness and Efficacy are Measured
Flu vaccine effectiveness & efficacy show how well flu vaccines work.
www.cdc.gov