Prática de Shadowing: When Your Body Attacks Itself – Autoimmune - Aprenda a falar inglês com vídeo
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Your immune system is an omnipresent, terrifying entity made of billions of nuclear weapons and kamikaze bombers, saturating every little tissue, bone and fluid in your body.
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It scans, patrols, and when it finds an enemy — it kills.
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But what if it suddenly decides that you are the enemy?
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This is the betrayal of autoimmunity – diseases like Type 1 diabetes, multiple sclerosis, celiac disease, lupus and Crohn's disease and many more.
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Literally every tissue can be affected, from your nerves to your thyroid or joints.
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They are all unique and different kinds of bad, from manageable to life changing to deadly.
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All share one fundamental property: Your immune system thinks some healthy part of you is the enemy.
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It’s like a country attacking itself: fighter jets bomb roads, snipers hunt doctors and baristas, artillery levels daycare centers.
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While there is usually a certain amount of genetic risk for autoimmunity, to get an actual autoimmune disease you also need a colossal case of bad luck on top of that.
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How does this work?
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The Shape Of Life The fundamental building blocks of life are proteins.
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Like ultra complex lego blocks each of them has a precise shape, allowing them to perform highly specific tasks, like breaking down food or transcribing DNA.
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In total your body produces about 100,000 different proteins, or shapes.
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Your immune system evolved to constantly check the proteins of your cells and look for shapes that are not you – and to kill whatever is attached to them violently and brutally.
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Autoimmunity is when your soldier cells suddenly think that your own healthy and natural proteins belong to an enemy.
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We explained this in more detail in this video – but in a nutshell: This is such a critical danger to your survival that your body created an entire murder university to prevent this from happening.
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Here, young immune cells go through ruthless training: if they recognize the shapes of your own proteins, they are executed immediately.
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But sometimes through sheer, dumb luck one makes it through.
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Right at this moment you probably have a few million cells patrolling your body with the potential to trigger an autoimmune disease.
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Another way to trigger autoimmunity is through our enemies: Some bacteria and viruses have evolved proteins that are extremely similar to the ones in your own body.
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Because they just have to if they want to interact with your cells – and to stay hidden.
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We see this everywhere in nature, from moths that look like bark or crocodiles that disappear in muddy water.
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For bacteria your tissue is a hostile jungle full of angry predators looking for them.
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So they try to cover themselves in shapes that are very similar to your proteins.
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But both of these things are not enough, the final ingredient is a trigger event.
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And a colossal case of bad luck.
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The War That Never Ends The trigger can be anything that activates your defenses.
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A common cold, the flu, a tiny wound.
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Any sort of infection floods your body with cytokines, signals that tell your body “this is a real fight, take this seriously” which truly wakes up your immune system.
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Intelligence cells start to gather proteins – shapes – from the battlefield.
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These shapes are the physical information of what is going on and are carried to your lymph nodes, information distribution centers.
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Here, your heavy weapons – T cells – pass through, taking a look at the shapes that are being presented here.
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If they recognize the shape of an invader they activate the whole immune system and a few days later the attacker will be wiped out.
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But this time the worst things happen in the worst kind of way.
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Maybe an intelligence officer picked up a piece of one of your healthy cells that died in the battle, or maybe a bacteria had a protein pretty similar to one of yours. And by sheer, extremely bad luck, a few months ago a single T cell that can recognize this shape survived the murder university.
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And today exactly this T cell happened to pass exactly this lymph node and is activated.
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This single T cell now starts a big immune reaction against your own body.
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It clones itself thousands of times, gathers other cells for support and streams into your tissue.
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When the misguided immune cells arrive they see nothing but enemies!
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The proteins they are looking for are everywhere!
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Which can only mean that there is a full on invasion going on!
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They spread out and start attacking and killing your tissue.
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How bad is this?
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Well, it depends.
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There are more than 100 different autoimmune diseases and basically any tissue can be affected.
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In Multiple Sclerosis your immune cells are attacking the insulation of your nerve cells, making them sort of short circuit or slow down dramatically.
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Causing numbness, muscle cramps, problems with your vision and concentration.
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In Type 1 Diabetes your immune system kills the cells that produce your insulin in your pancreas, starving your cells of glucose and turning your blood into acid.
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In Rheumatoid Arthritis angry cells invade your joints and literally start to dissolve cartilage and bone.
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Lupus is a body-wide Blitzkrieg that attacks literally every part of your body causing painful, unpredictable and widespread destruction with a variety of bad symptoms.
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And almost all autoimmune diseases come with crushing fatigue and exhaustion.
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Because when you are sick, your immune system tells your body to shut down and rest.
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Even if the immune system is itself the attacker, it still sends out the same orders.
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It feels like you have the flu but the real enemy is your own body.
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The worst part about autoimmunity is that it never stops.
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Your immune system is a self enforcing machine of destruction.
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The more “enemies” your initial autoimmunity cells encounter the more cells they clone and activate.
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So its nature prevents lasting peace.
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Why is your Body allowing this?
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Most, if not all, autoimmune diseases have a genetic component but this is kind of weird.
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If some variants of genes are actively harmful to us, evolution should weed them out and make them less common.
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But up to one in ten people in the industrialized world suffers from them.
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So why did they stick around?
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Well when it comes to genes, we often have to work with trade offs – at their core autoimmune diseases always mean that your immune system is more aggressive – and while this is mostly bad, until recently in human history, this was pretty great.
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In the past infectious diseases were the most common cause of death.
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Terrible pandemics ravaged our cities regularly, sometimes decimating communities.
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Researchers analyzed DNA samples from London cemeteries before, during, and after the Black Death pandemic that killed about half of the population.
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They found that individuals with gene variants that increase the risk for Crohn’s disease, seemed to have died at a much lower rate.
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What helped them against a deadly disease back then might make us vulnerable to autoimmunity today.
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Evolution doesn’t care about perfect solutions, it is only looking for good enough.
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If variants made it more likely to survive the deadliest diseases, why care if down the line this might lead to something else?
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If you have an autoimmune disease you may only be alive because your ancestors carried these genes and survived a pandemic that wiped out their neighbours.
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And then a hot second ago we changed our world.
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Hygiene, antibiotics, vaccines and modern medicine revolutionized our lives and how we die.
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So much so that most of us don’t even think a lot about infectious diseases – and this is great.
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But now we are left with genes that make our immune systems more aggressive for no good reason.
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Add a bit of bad luck and all these billions of nuclear weapons and kamikaze bombers take aim at the wrong target: You.
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Your immune system isn’t the only part of yourself that can be turned against you.
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Data brokers are constantly collecting personal information like your name, address or information about your relatives.
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Vocabulário e dicas de fala para esta lição
Esta aula de conversação de nível C1 usa o vídeo “When Your Body Attacks Itself – Autoimmune”. As palavras que mais se repetem: cell, immune, disease, shape, protein. Este vídeo tem 89 frases e 1557 palavras para praticar shadowing. A fala dura 9:33. O falante fala em ritmo natural, cerca de 163 palavras por minuto, próximo de uma conversa do dia a dia. Apenas 78% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.
Vocabulário principal deste vídeo
As 15 palavras mais avançadas do vídeo, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| autoimmune adjetivo | /ˌɔːtəʊɪˈmjuːn/ | autoimune |
| autoimmunity substantivo | /ˌɔːtoʊɪˈmjuːnɪti/ | autoimunidade |
| activate verbo | /ˈæktɪˌveɪt/ | ativar |
| bacterium substantivo | /bækˈtɪəɹ.ɪəm/ | bactéria |
| nutshell substantivo | /ˈnʌt.ʃɛl/ | casca de noz |
| variant substantivo | /ˈvæɹi.ənt/ | variante |
| colossal adjetivo | /kəˈlɑsəl/ | colossal |
| kamikaze substantivo | /ˌkɑː.mɪˈkɑː.ziː/ | camicase, kamikaze |
| lupus substantivo | /ˈluːpəs/ | lúpus |
| lymph substantivo | /lɪmf/ | linfa |
| sclerosis substantivo | /skləˈɹəʊ.sɪs/ | esclerose |
| attacker substantivo | /əˈtækɚ/ | agressor, atacador |
| clone substantivo | /kloʊn/ | clone |
| evolve verbo | /ɪˈvɑlv/ | desenvolver, elaborar |
| infectious adjetivo | /ɪnˈfɛk.ʃəs/ | infeccioso, contagioso |
Phrasal verbs que você vai ouvir
| Palavra | Pronúncia | Significado |
|---|---|---|
| wipe out verbo | aniquilar, exterminar | |
| get off verbo | sair | |
| pick up verbo | pegar | |
| shut down verbo | apagar, encerrar | |
| sign up verbo | subscrever | |
| slow down verbo | desacelerar | |
| spread out verbo | espalhar-se | |
| wake up verbo | /ˌweɪk ˈʌp/ | acordar, despertar |
Pronúncia para ficar de olho
O falante usa 4 contrações e formas reduzidas, como doesn't, don't, isn't. Diga-as na forma curta, do jeito que você ouve.
- Os sons de “th”: thyroid /ˈθaɪ.ɹɔɪd/, ruthless /ˈɹuːθləs/
- Os sons de “sh” e “zh”: nutshell /ˈnʌt.ʃɛl/, infectious /ɪnˈfɛk.ʃəs/, sheer /ʃɪɚ/, revolutionize /ˌɹɛv.əˈl(j)u.ʃəˌnaɪz/, insulation /ˌɪnsəˈleɪʃən/
- Palavras longas — acerte a sílaba tônica: autoimmunity /ˌɔːtoʊɪˈmjuːnɪti/, kamikaze /ˌkɑː.mɪˈkɑː.ziː/, industrialize /ɪnˈdʌstɹiəlaɪz/, manageable /ˈmænəd͡ʒəb(ə)l/, nefarious /nɪˈfɛəɹi.əs/
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: activate /ˈæktɪˌveɪt/, variant /ˈvæɹi.ənt/, node /noʊd/, wipe /waɪp/, celiac /ˈsiːli.æk/
- /l/ final — a língua toca o céu da boca, não vira “u”: nutshell /ˈnʌt.ʃɛl/, colossal /kəˈlɑsəl/, crocodile /ˈkɹɑkədaɪl/, manageable /ˈmænəd͡ʒəb(ə)l/, betrayal /bɪˈtɹeɪəl/
- /h/ — um sopro suave, diferente do “r”: harass /həˈɹæs/, hygiene /ˈhaɪˌd͡ʒiːn/, harmful /ˈhɑɹmfl̩/, hostile /ˈhɑstəl/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
- Grave a sua voz e compare com o original, prestando atenção a palavras como autoimmune, autoimmunity, activate.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.