I used Loophole + my own method to make the LR formulaic as much as i could atleast. This method will help with NA, weakness, and strengthening questions for most part. other questions are i think much easier

P1: Infection with vaccine is coincidence

Conclusion: Vaccine is not of any concern

Loophole "what if" method apply leading to negated conclusion to show it can be of concern

"What if" x can be of a concern

What if infection with vaccine has worse outcome then it is of concern.

NA would be: infection with vaccine is same outcome/severity

Weakness: Worse severity

Strengthening: same or lesser severity

What if basically doing it this way helps you pick up the gap to play with. LMK if anyone has any questions. Feel free to put in your inputs thanks!.