Once upon a time, there were 998 people taking part in a test. 

  
They wanted to see if the flu vaccination was effective. 

So half of them had the flu shot, and the other half did not. 

The first group suffered 33 cases of severe reaction – redness at the site of injection, malaise and a generally unwell feeling for as long as 16 days. Another 321 people reported feeling mildly unwell. None of the first group died. 
The second group suffered no side effects whatever – as they were not given the flu injection. 

Three of the participants in the second group caught the flu and died. 

Vaccination works. 

Don’t kid yourself.