The ladder theory is stupid...
There are a set of rules to get any girl in practically any scenario into your bed or getting her no. its all about NLP and being able to communicate effectively(rigth answers what the chick wants to hear give it to her, if she doesnt want it convoince her that...
im pretty sure
you had to go into depth about the immune responce.. the stimulation of b cell to create specific antibodies and whatever... then from that go onto describe why t memory cells would not recoginze changing antigens such as the influenza virus and teh effects it would have upon...