Please can you do the math? The below figures might not be up to date as of 1/1/21 but basic math shows that 500k people are above 18 in Luxembourg, that makes 350k people vaccinated by July. You would have to vaccinate well over 350k before you reach the -30yo tranche.
Considering that only 90k people have been vaccinated so far (since December), that is an 200% uptick within the next 2 months... lets look at it again in July and we see... but our government constantly promises vaccinations but does not deliver, other countries do much better (yes other countries do worse, I know but should this be the benchmark?)