A-level Biology VACCINATIONS- Passive and Active Immunity. The importance of HERD IMMUNITY.

Learn how vaccines provide artificial active immunity. Learn the difference between passive and active immunity and why herd immunity is important.
For past paper questions linked to this topic click these links.
missestruch.com/
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[@hk4033]

love that you only included relevant content from the spec, straight to the point and explained very clearly. thank you!

[@MissEstruchBiology]

So glad you find it helpful. 😀

[@josephinematty6536]

You are amazing.Thank you. Please continue making videos.❤

[@MissEstruchBiology]

ahh thank you! I will 😀

[@alexandergouk5715]

This really helped for my exams thanks

[@MissEstruchBiology]

Ah so pleased 😊 Good luck with your exams!

[@surpremier]

so helpful thanks!

[@MissEstruchBiology]

Glad it helped 😊

[@blueamets]

Thank you ❤

[@SaveMyAL]

underrarted

[@user-gs3fj8or6h]

here before my mock exams because i learnt nothing in lockdown. thank you!

[@MissEstruchBiology]

Best of luck! I'm glad the videos are helping you with your revision. :D

[@lilac_turnip4767]

Hi miss, why do "disease diagnosis occur by testing for the presence of specific pathogen antibodies in the blood" instead of testing for antigens?

[@stopmotion6822]

Life changing

[@bennettso287]

For real

[@AG-ql1sy]

hello:) , at 2:06 under natural immunity it says creation of the bodies own antibodies, is that only possible from plasma cells directly or can antibodies magically appear from somewhere other than plasma cells?

[@MissEstruchBiology]

This I still from plasma cells 😊

[@user-vq4qy2hq5i]

How does passive immunity work - what is the point if there are no memory cells? Also, is herd immunity a type of this?

[@reece3231]

when talking about how vaccination leads to immunity, do you not have to mention the role of helper T cells?

[@MissEstruchBiology]

Hello,
it would depend the exact emphasis and number of marks on the exam question. They key focus is the production of memory cells so that when reinfected many antibodies are produced rapidly, but t-helper cells could help initiate this response when reinfected.

[@noelle4145]

@@MissEstruchBiology so can antigens alone activate b cells to go through clonal selection ? Also if the question required you to mention t helper cells would you still talk about endocytosis and it becoming an apc? sorry I know this is a long question.

[@apersononyoutube8721]

Hi Miss, your slide says that A pathogen doesn’t enter the body so plasma cells are memory cells are not made, so if no pathogen enters what is the need for antibodies?

[@jesscoombs2176]

if you are talking about in passive i think that antibodies can be used as a short term treatment, she mentions treating toxin of a snake bite where someone needs to attack it very quickly but as the antibodies are not made by the person the body wont be able to produce the memory cells. hope this is right its what I thought she was saying

[@MissEstruchBiology]

Hey thanks for answering this Jess, and yes it is exactly as you explained!

[@hamzahali9940]

where is video 18 of the play list please may you link it as it says "1 unavailable video is hidden"

[@MissEstruchBiology]

I removed that one as I uploaded a newer version, so no theory content is missing from the playlist.

[@mrspedrix1858]

is memory B cells process active immunity

[@mangooiikiiijnjmm4475]

hi thank you for the video:) please could you explain what makes the primary response take a long time to come about

[@MissEstruchBiology]

it's due to the time it takes to to find B cells that can make the complementary shaped antibodies

[@mangooiikiiijnjmm4475]

@@MissEstruchBiology thank you , I understand now

[@aarizmushtaq4301]

Immunity is sooo confusing

[@Wojbes]

fun fact: this video was made on a laptop 4:32