Earlier quoted context omitted.
Just to give you one possible side effect: sterility. There are plenty of viruses that when caught as a child do not give much in terms of symptoms but will make you sterile for life. That's not something that will come out in the next two months.
True, and whether MMR 2 will kill you or your mind in 60 years isn't something that comes out in 42 years. We don't know that yet. But if I had to guess, you're probably pro-MMR-2 (as am I), so the question is what epistemology permits that view?
For COVID-19 we are still guessing at most of this, hopefully the long term effects are not too bad and those effects of contracting the disease will get reduced over time.
But I would definitely not rule out some shocker long term effect at this stage that we are unaware of, especially not when taking into account developing organisms such as children, where effects can stay hidden for a long time.