154 million lives saved in 50 years: 5 charts on the global success of vaccines
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We know vaccines have been a miracle for public health. Now, new research led by the World Health Organization has found vaccines have saved an estimated 154 million lives in the past 50 years from 14 different diseases. Most of these have been children under five, and around two-thirds children under one year old.
In 1974 the World Health Assembly launched the Expanded Programme on Immunization with the goal to vaccinate all children against diphtheria, tetanus, pertussis (whooping cough), measles, polio, tuberculosis and smallpox by 1990. The program was subsequently expanded to include several other diseases.
The modelling, marking 50 years since this program was established, shows a child aged under ten has about a 40% greater chance of living until their next birthday, compared to if we didn’t have vaccines. And these positive effects can be seen well into adult life. A 50-year-old has a 16% greater chance of celebrating their next birthday thanks to vaccines.
What the study did
The researchers developed mathematical and statistical models which took in vaccine coverage data and population numbers from 194 countries for the years 1974–2024. Not all diseases were included (for example smallpox, which was eradicated in 1980, was left out).
The analysis includes vaccines for 14 diseases, with 11 of these included in the Expanded Programme on Immunization. For some countries, additional vaccines such as Japanese encephalitis, meningitis A and yellow fever were included, as these diseases contribute to major disease burden in certain settings.
The models were used to simulate how diseases would have spread from 1974 to now, as vaccines were introduced, for each country and age group, incorporating data on increasing vaccine coverage over time.
Children are the greatest beneficiaries of vaccines
Since 1974, the rates of deaths in children before their first birthday has more than halved. The researchers calculated almost 40% of this reduction is due to vaccines.
The effects have been greatest for children born in the 1980s because of the intensive efforts made globally to reduce the burden of diseases like measles, polio and whooping cough.
Some 60% of the 154 million lives saved would have been lives lost to measles. This is likely due to its ability to spread rapidly. One person with measles can spread the infection to 12–18 people.
The study also found some variation across different parts of the world. For example, vaccination programs have had a much greater impact on the probability of children living longer across low- and middle-income countries and settings with weaker health systems such as the eastern Mediterranean and African regions. These results highlight the important role vaccines play in promoting health equity.
Vaccine success is not assured
Low or declining vaccine coverage can lead to epidemics which can devastate communities and overwhelm health systems.
Notably, the COVID pandemic saw an overall decline in measles vaccine coverage, with 86% of children having received their first dose in 2019 to 83% in 2022. This is concerning because very high levels of vaccination coverage (more than 95%) are required to achieve herd immunity against measles.
In Australia, the coverage for childhood vaccines, including measles, mumps and rubella, has declined compared to before the pandemic.
This study is a reminder of why we need to continue to vaccinate – not just against measles, but against all diseases we have safe and effective vaccines for.
The results of this research don’t tell us the full story about the impact of vaccines. For example, the authors didn’t include data for some vaccines such as COVID and HPV (human papillomavirus). Also, like with all modelling studies, there are some uncertainties, as data was not available for all time periods and countries.
Nonetheless, the results show the success of global vaccination programs over time. If we want to continue to see lives saved, we need to keep investing in vaccination locally, regionally and globally.
Meru Sheel, Associate Professor and Epidemiologist, Infectious Diseases, Immunisation and Emergencies Group, Sydney School of Public Health, University of Sydney and Alexandra Hogan, Mathematical epidemiologist, UNSW Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Walking… Better.
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Walking… Better.
We recently reviewed “52 Ways To Walk” by Annabel Streets. You asked us to share some more of our learnings from that book, and… Obviously we can’t do all 52, nor go into such detail, but here are three top tips inspired by that book…
Walk in the cold!
While cold weather is often seen as a reason to not walk, in fact, it has numerous health benefits, the most exciting of which might be:
Walking in the cold causes us to convert white and yellow fat into the healthier brown fat. If you didn’t know about this, neither did scientists until about 15 years ago.
In fact, scientists didn’t even know that adult humans could even have brown adipose tissue! It was really quite groundbreaking.
In case you missed it: The Changed Metabolic World with Human Brown Adipose Tissue: Therapeutic Visions
Work while you walk!
Obviously this is only appropriate for some kinds of work… but if in your life you have any kind of work that is chiefly thinking, a bunch of it can be done while walking.
Open your phone’s note-taking app, lock the screen and pocket your phone, and think on some problem that you need to solve. Whenever you have an “aha” moment, take out your phone and make a quick note on the go.
For that matter, if you have the money and space (or are fortunate to have an employer disposed towards facilitating such), you could even set up a treadmill desk… At worst, it wouldn’t harm your work (and it’ll be a LOT better than sitting for so long).
Walk within an hour of waking!
No, this doesn’t mean that if you don’t get out of the house within 60 minutes you say “Oh no, missed the window, guess it’s a day in today”
But it does mean: in the evening, make preparations to head out first thing in the morning. Set out your clothes and appropriate footwear, find your flask to fill with the beverage of your choice in the morning and set that with them.
Then, when morning arrives… do your morning necessaries (e.g. some manner of morning ablutions and perhaps a light breakfast), make that drink for your flask, and hit the road.
Why? We’ll tell you a secret:
You ever wondered why some people seem to be more able to keep a daylight-regulated circadian rhythm than others? It’s not just about smartphones and coffees…
This study found that getting sunlight (not electric light, not artificial sunlight, but actual sunlight, from the sun, even if filtered through partial cloud) between 08:30—09:00 resulted in higher levels of a protein called PER2. PER2 is critical for setting circadian rhythms, improving metabolism, and fortifying blood vessels.
Besides, on a more simplistic level, it’s also a wonderful and energizing start to a healthy and productive day!
Read: Beneficial effects of daytime light exposure on daily rhythms, metabolic state and affect
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Metabolical – by Dr. Robert Lustig
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The premise of this book itself is not novel: processed food is bad, food giants lie to us, and eating better makes us less prone to disease (especially metabolic disease).
What this book does offer that’s less commonly found is a comprehensive guide, a walkthrough of each relevant what and why and how, with plenty of good science and practical real-world examples.
In terms of unique selling points, perhaps the greatest strength of this book is its focus on two things in particular that affect many aspects of health: looking after our liver, and looking after our gut.
The style is… A little dramatic perhaps, but that’s just the style; there’s no hyperbole, he is stating well-established scientific facts.
Bottom line: very much of chronic disease would be a lot less diseasey if we all ate with these aspects of our health in mind. This book’s a comprehensive guide to that.
Click here to check out Metabolical, and let food be thy medicine!
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Natto vs Tempeh – Which is Healthier?
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Our Verdict
When comparing nattō to tempeh, we picked the nattō.
Why?
Both are great, but in the battle of fermented soybeans vs fermented soybeans with extra steps, it turns out that the simplest option is the best, even if tempeh was a close runner-up:
In terms of macros, nattō has more carbs and fiber for the same protein and fat; we’ll call this category a tie or a marginal win for nattō.
In the category of vitamins, nattō has more of vitamins B1, C, E, K, and choline, while tempeh has more of vitamins B2, B3, B6, and B9. A clearer, yet still modest, win for nattō.
Minerals, however, are what really set them apart: nattō has more calcium, copper, iron, magnesium, manganese, potassium, selenium, and zinc, while tempeh has more phosphorus. An overwhelming win for nattō this time.
In short: enjoy either or both, but nattō is the more nutritionally dense option!
Want to learn more?
You might like:
21% Stronger Bones in a Year at 62? Yes, It’s Possible (No Calcium Supplements Needed!) ← nattō is featured as part of the diet 😎
Enjoy!
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Parsley vs Spinach – Which is Healthier?
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Our Verdict
When comparing parsley to spinach, we picked the parsley.
Why?
First of all, writer’s anecdote: today’s choice brought to you by a real decision here in my household! You see, a certain dish I sometimes prepare (it’s just a wrap-based dish, nothing fancy) requires a greenery component, and historically I’ve used kale or spinach. Of those two, I prefer kale while my son, who lives (and dines) with me, prefers spinach. However, we both like parsley equally, so I’m going to use that today. But I was curious about how it performed nutritionally, hence today’s comparison!
Ok, now for the stats…
In terms of macros, the only difference is that parsley has more fiber and carbs, for an approximately equal glycemic index, so we’ll go with the one with the highest total fiber, which is parsley.
In the category of vitamins, parsley has more of vitamins B3, B5, B7, B9, C, and K, while spinach has more of vitamins A, B2, B6, E, and choline. So, a marginal 6:5 win for parsley (and in the margins of difference are also in parsley’s favor, for example parsley has 13x the vitamin C, and 2x or 3x the other vitamins it won with, while spinach boasts 2x for some vitamins, and only 1.2x or 1.5x the others).
When it comes to minerals, parsley has more iron, phosphorus, potassium, and zinc, while spinach has more copper, magnesium, manganese, and selenium. So, a 4:4 tie on these.
In terms of phytochemicals, parsley has a much higher polyphenol content (that’s good) while spinach has a much higher oxalate content (that’s neutral for most people, but bad if you have certain kidney problems). So, another win for parsley.
Adding up the sections makes a clear overall win for parsley, but by all means enjoy either or both, unless you are avoiding oxalates, in which case, the oxalates in spinach can be reduced by cooking, but honestly, for most dishes you might as well just pick a different greens option (like parsley, or collard greens if you want something closer to the culinary experience of eating spinach).
Want to learn more?
You might like:
Invigorating Sabzi Khordan ← another great way to enjoy parsley as main ingredient rather than just a seasoning
Enjoy!
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Four Habits That Drastically Improve Mobility
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Mobility is critical for health living, but stretching isn’t the entire story:
Beyond just stretching
Liv Townsend, of LivInLeggings fames, recommends these four habits:
- Sit less: prolonged sitting affects hip and shoulder mobility. Specifically, it affects it negatively. It is also a bringer of woe in many other ways beyond the scope of what we’re doing here today, but the important thing for mobility is to sit less. So, if you spent a lot of time at a desk, invest in a standing desk (writer’s note: I dearly love mine, which is technically a sit-stand converter like this one on Amazon but I just keep it in the up position all the time, so it’s easy to forget it has multiple settings. Anyway, it’s sooooooo much better for my back than sitting for hours at a time.). For how to deal with other (i.e. not desk-related) reasons you might be sitting a lot, check out: Stand Up For Your Health (Or Don’t*)
- Take creatine: more than just for strength and muscle-building (and even aside from its brain-benefits that it bestows to older people, but not young ones), creatine also supports mobility and flexibility. Any brand is fine, so long as creatine monohydrate is the sole ingredient. Also, micronized or not is also fine—that’s just to do with whether it’s been pre-compacted into super-tiny beads (so small that it will still effectively be a powder), which helps it to avoid clumping when mixed in a liquid, that’s all. It shouldn’t have any additives either way (so, check labels to ensure it doesn’t).
- Spend more time under tension: no, we’re not talking about texting your spouse “we need to talk”, but rather, this means that when we do stretch, we should spend longer in the stretched position. While dynamic stretching has its place, passive stretching (holding stretches for longer periods) is essential and shouldn’t be overlooked.
- Incorporate “movement snacks”: this is about when we are going about our daily life, we should move more while doing everyday tasks. Get in some shoulder stretches while waiting for the kettle to boil, deep squat while petting the dog, etc. These are very important, because mobility is very much a “use it or lose it” thing, and so moving in many different ways, frequently, is the only way to ensure full coverage (no stretching regimen is going to be able to cover the many compound movements that we do in everyday life).
*That article also covers how to avoid the damage of sitting even if you cannot physically stand!
For more on all of these, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Mobility As Though A Sporting Pursuit: Train For The Event Of Your Life!
Take care!
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How Does Someone Die From Dementia?
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Dementia is most often thought of in terms of the loss of certain cognitive faculties during the disease’s progress. So how does death occur?
A quiet departure
Notwithstanding it being a widely-feared disease (or set of diseases, since we’re using the umbrella term of dementia, and not the most well-known and common kind, Alzheimer’s), death from dementia is usually a peaceful one; any distressing confusions are usually in the past by this point.
Sometimes, it is not the dementia itself that directly causes death; rather, it leaves someone much more vulnerable to infections, with pneumonia being top of the list, and UTIs also ranking highly. And while a younger healthier person might drink some cranberry juice and shrug it off, for an older person with dementia, even a UTI can be much more serious. Pneumonia, of course, is well-known for often being the final straw.
Sometimes, it is the dementia that directly causes death; the disease causes a slow decline until the person stops eating and drinking. At this time, they will also tend to sleep more, and as mentioned, experience much less agitation and confusion than previously.
In terms of caregiving at this late stage, the hospice worker in the video recommends to do one’s best to keep the person clean and safe from falls or infections, check common pressure sore sites for redness, changing their position if necessary and using pillows to relieve any undue pressure.
For more on all of this, see:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
When Planning Is A Matter of Life & Death: Managing Your Mortality
Take care!
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