btw for the vaccination question, did you guys talk about how its effectiveness was limited by the fact that they didn't continue vaccinating people in the later ages? i talked about how although theyre providing people with immunity across all these ages, their memory B cells are likely to be absent by the time they're 65+, requiring the vaccination schedule to last longer if they want to address the main people who suffer from tetanus.
idk if this is right but i think itd prolly be:
1 mark for describing how vaccine works (primes the B and T cells and immune response by exposing to fragments of pathogen)
1 mark for discussing why multiple doses were given (antibody concentration would go down gradually if the body hadnt encountered the pathogen)
1 mark for explaining the amount of the dose (baby immune system would be weaker than 13 year olds so it might be fatal to give a high dose; u needa gradually build immunity)
1 mark for what might be the reason for giving higher doses (i.e giving the whole pathogen at once would be very tough on body so first dose may just contain fragments, second dose may contain fragments + pathogenic proteins etc.)
1 mark for specific reference to the stimulus (use values, mention immunity)