In fact opinion which seems to have very little to do with his claim (limited duration of immunity following vaccination for measles leading to many cases in young adults).
1 - Even if Dr Halvorsen’s has “form” on this matter in the France 24 piece the discussion on measles vaccination did not make the claim that young adults are getting measles because the vaccination only provides limited protection - he even stated that he was in favour of vaccination.
2- A fact free letter to the BMJ merely asking/opining whether immunisation should be reserved for high risk individuals and the rest left to acquire natural immunity. Possibly a bit left of field even then but 1980 was a long time ago. The idea the measles is “a mild disease” comes up again which was a point raised in the first reference - yes, it is mild in many but it is severe in some and fatal in others. If we can improve on the natural mortality of this disease we should do so.
3 - I can’t find this data.
4 - Data from the pre-vaccination era; hardly relevant to your claim. Yes mortality had been falling before vaccination was introduced because medical care generally was improving- especially antibiotics (while measles is a virus the pneumonia that some get can be caused or complicated by a bacterial superinfection in the same way that influenza can precede a bacterial pneumonia). Your point is?
5 - I’m not paying good money to read Dr Thomas’s book - all I need to know is that he appears to still be beating the vaccination causes autism drum. That relationship has been busted more times than someone playing casino blackjack for a week straight without sleep.
So, err, not convinced. Thanks for trying though.