We can prevent the next epidemic - George Zaidan

399,766 views ・ 2023-05-23

TED-Ed


Please double-click on the English subtitles below to play the video.

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Ebola is one of the deadliest viruses we know of.
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If left untreated, it kills about half of those it infects.
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It can spread through pretty much every fluid your body makes,
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including blood and sweat.
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Even the dead can transmit the disease, often doing so at their own funerals.
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On December 26th, 2013, a two-year-old boy in southern Guinea got sick.
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Just two days later, he died.
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It took local doctors working with the international community
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four months to discover that Ebola was to blame,
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largely because it had never before been detected outside of Central Africa.
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In those four months, Ebola gained a head start that would prove devastating.
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The outbreak lasted two years
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and mushroomed into the largest Ebola epidemic in recorded history.
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More than 28,000 people contracted the disease and over 11,000 died.
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In 2013, Guinea had no formal emergency response system,
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few trained contact tracers, and no rapid tests,
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border screenings, or licensed vaccine for Ebola.
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After that epidemic, Guinea,
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with the support of the US and other international partners,
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completely overhauled their epidemic response system.
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And in January 2021, that system faced its first real test.
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It started when a nurse in southern Guinea developed a headache, vomiting, and fever.
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A few days later, she died.
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As dictated by traditional burial practices,
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her family prepared her body for the funeral.
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Within a week, the nurse’s husband and other family members
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started experiencing symptoms.
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Health officials suspected Ebola much quicker than in 2013 and ordered tests.
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They came back positive,
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and Guinea activated its epidemic alert system the next day.
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Then, lots of things happened very quickly.
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Guinea’s National Agency for Health Security
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activated 38 district-level emergency operations centers,
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as well as a national one.
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Teams of epidemiologists and contact tracers began the painstaking job
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of figuring out exactly who was exposed and when,
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generating a list of 23 initial contacts that quickly grew to over 1,100.
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Advanced rapid testing capacity spun up in the city where the outbreak started.
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At Guinea’s borders with Liberia and Cote d’Ivoire,
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public health workers screened more than 2 million travelers.
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A large-scale vaccination campaign was started.
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And, finally, more than 900 community mobilizers
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alerted people of the outbreak
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and suggested alternative burial practices that were acceptable to the community
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and reduced the risk of spreading Ebola.
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Thanks to all these measures,
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the 2021 outbreak ended just four months after it began.
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Only 23 people contracted Ebola; only 12 died.
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That's less than 1% of the deaths in the prior outbreak.
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The 2021 outbreak cost $100 million to control—
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which sounds like a lot but pales in comparison
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to the global economic cost of the previous outbreak:
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$53 billion.
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So should every country just copy Guinea’s approach?
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Not exactly.
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It is always important to respond to an outbreak quickly,
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so an early warning system is essential.
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But beyond that, a successful response can look very different
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for different diseases in different countries.
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For example, Brazil quenched an outbreak of yellow fever,
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which is spread by mosquitoes,
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primarily by mounting a massive vaccination campaign.
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That strategy worked well for Brazil
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because it’s one of the major global producers of the yellow fever vaccine,
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and its population was accustomed to regular, routine vaccinations.
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But for many diseases, you don't even need a mass vaccination program.
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In August of 2021, a truck driver tested positive for cholera in Burkina Faso.
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Health care workers alerted the government that same day
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and contact tracing began immediately.
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Cholera is caused by a bacterium,
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so Burkina Faso gave antibiotics to those exposed or potentially exposed.
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This extremely fast response stopped the outbreak
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just a few weeks after it started.
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Cholera often rears its head in West Africa—
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in 2021, there were over 100,000 cases and more than 3,700 deaths.
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Because Burkina Faso was so well prepared, they had zero deaths that year.
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Zero.
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In Chiang Mai, Thailand, health officials piloted
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a community-owned, community-driven outbreak alert system
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to monitor animal health—
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that’s important because some animal outbreaks have the potential
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to spill over and become human outbreaks.
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Villagers used an app to alert health authorities about outbreaks in animals.
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Over the course of 16 months, 36 animal outbreaks were identified.
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For any outbreak response system to be effective,
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it needs to be trusted, valued, and ultimately used by communities.
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That means reaching people where they are, in the language they speak,
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and aware of the culture, beliefs, and practices with which they live.
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Perhaps most importantly, we can't expect to do nothing for years
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and then just swing into action when an outbreak occurs.
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One of the best ways to save lives is to invest in lasting health infrastructure,
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365 days a year, for everyone,
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especially the most vulnerable among us.
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