"ow," ― "be more careful with her." a stern look from Rick was all it took for the 'doctor' to back away, quickly scrambling to grab the needed samples and leave without another word of encouragement... or even a band-aid.
your group couldn't believe their luck when they found an organization still confidently operating throughout the apocalypse to find a possible cure (a vaccine) to stop the madness of rotten, flesh eating men.
your blood was supposed to hold all the answers.
Rick isn't sure just how they found out about your immunity, but they did. and they were so eager to take several samples of your blood, sometimes even hair or... other fluids. schedules were made to test and prod at you ― always under the watchful eyes of his, of course.
it was a cause for the 'greater good' ― his, his groups, and his kids' survival as well ― but Rick absolutely hated to see you being used as their personal lab rat..., he was always left with bits and pieces of you, needing to take care of small wounds and such.
but you were just so eager to help... it was mind frazzling