Smallpox killed half a billion people in its final century. Then humanity hunted it to extinction — the only disease we have ever wiped out, ending with one hospital cook in Somalia.
Ten items. Work through the four activities — say your answer out loud before you reveal it.
Three words: a strain · a campaign · surveillance. Say the right one, then reveal.
Read each part. After it, there's a quick check (answer from memory first), then one question to discuss.
No enemy in human history killed like smallpox. It struck pharaohs — the mummy of Ramses V carries its scars — emptied cities, helped bring down empires in the Americas, and killed kings, queens and emperors on every continent. It spared no class and no country: in the twentieth century alone, with modern medicine already existing, it killed an estimated three hundred million people — more than all that century's wars combined. Those who survived variola major, the deadly strain that killed roughly one victim in three, were often left blind or scarred for life. There was no treatment. There was only one mercy: survivors never caught it twice.
That mercy became a weapon in stages. For centuries, Asia and Africa had practised variolation — deliberately infecting the healthy with matter from mild cases, dangerous but far less deadly than the disease itself; the technique reached Europe in the 1700s. Then, in Gloucestershire in 1796, the country doctor Edward Jenner acted on a piece of local folklore: milkmaids, who often caught the mild cowpox from their animals, seemed never to catch smallpox at all. Jenner took material from a milkmaid's cowpox sore and scratched it into the arm of James Phipps, his gardener's eight-year-old son — then, weeks later, deliberately exposed the boy to smallpox. Phipps did not fall ill. Jenner named the technique after the cow — vacca — and vaccination was born, along with an ethics case still argued in classrooms.
Over the next century and a half, vaccination beat smallpox back — from Europe, from North America — but only where health systems reached. By the 1960s the disease still infected some ten to fifteen million people a year across dozens of countries, and in a jet-connected world, every country remained one aeroplane from reinfection. In 1966 the World Health Organization voted — by two votes, after years of scepticism — to attempt what had never been attempted: not control, but eradication. Total, global, permanent. The budget was absurdly small, the deadline set at ten years, and the campaign's own leaders privately rated the odds as poor.
1. What made smallpox uniquely terrible — and what was the one mercy?
2. What did Jenner do in 1796, and why does it remain an ethics case?
1. It killed ~300 million in the 20th century alone, a third of those infected with the major strain, blinding and scarring survivors, striking every class and country. The mercy: survivors were immune for life.
2. He vaccinated a child with cowpox, then deliberately exposed him to smallpox to test the protection. It founded vaccination — and it was an experiment on an eight-year-old with no modern notion of consent.
The campaign that began in 1967, led by the American epidemiologist D.A. Henderson with a deliberately international staff, assumed it would win by mass vaccination — inject everyone, everywhere. Reality re-taught it within a year. In eastern Nigeria, a team running short of vaccine tried the economical alternative: find every case, isolate it, and vaccinate everyone in a ring around it — family, neighbours, contacts. The outbreak died with a fraction of the doses. The lesson generalised into the campaign's true strategy: surveillance and containment. You did not need to vaccinate the world. You needed to find the virus — every single time it appeared — and surround it.
Finding it became a planetary detective effort. Teams with photograph cards crossed markets, villages and war zones asking one question — have you seen this? — and rewards for reporting a case grew steadily as cases became precious. The tools were built for the terrain, not the laboratory: a freeze-dried vaccine that survived tropical heat without refrigeration, and the bifurcated needle — two prongs holding one drop, fifteen quick touches, teachable to any volunteer in minutes and using a quarter of the old dose. The campaign vaccinated through wars by arranging truces, through floods by boat, through borders by negotiating with whoever actually controlled them. Cold War rivals ran it together throughout: the eradication resolution had been Soviet-proposed, the vaccine stocks were substantially Soviet-donated, and the leadership American — one of the very few great projects the two blocs built jointly.
Country by country the map went white. South America's last case came in 1971; Asia's — after a colossal endgame in India and Bangladesh involving millions of house visits per month — in 1975, a Bangladeshi toddler named Rahima Banu, who recovered. The virus made its last stand in the Horn of Africa, and on 26 October 1977, in the Somali port town of Merca, it infected its final natural victim: Ali Maow Maalin, a young hospital cook — who, in the story's perfect irony, had himself once dodged vaccination. He caught the milder strain, survived, and spent the rest of his life as a vaccination campaigner against polio, telling his story village by village: I was the last one; don't let it be you. He died in 2013 — of malaria, contracted on a vaccination drive.
1. What strategic discovery replaced mass vaccination, and where did it come from?
2. Who was the last natural case, and what did he do with the rest of his life?
1. Surveillance and containment — ring vaccination — discovered when a vaccine-short team in eastern Nigeria killed an outbreak by finding cases and vaccinating circles around them. Find the virus every time; surround it.
2. Ali Maow Maalin, a Somali hospital cook, in October 1977 — a man who had himself avoided vaccination. He survived and became a lifelong vaccination campaigner against polio, dying in 2013 of malaria while on a vaccination drive.
The story's final death did not come from nature. In 1978, a year after Maalin's recovery, the virus escaped from a laboratory at Birmingham Medical School in England and killed Janet Parker, a medical photographer who worked one floor above; the laboratory's professor took his own life during the investigation. The tragedy hardened the world's resolve about the remaining samples: today the virus officially exists in exactly two freezers — one in Atlanta, one in Russia — and the argument about whether to destroy those last vials has continued for four decades, security against science, and remains unresolved.
On 9 December 1979, after two years of hunting for cases that no longer existed — with rewards unclaimed on every continent — a global commission certified the conclusion, and in May 1980 the World Health Assembly declared it formally: smallpox was dead. The disease that had killed half a billion people in its final century was gone, everywhere, forever. The entire thirteen-year campaign had cost roughly three hundred million dollars — about the price, then, of a few fighter aircraft — and is routinely calculated to have repaid itself within months of victory, in vaccinations no longer needed, every year, forever. It remains the highest return on investment in the history of public health, and arguably of anything.
And it has never been repeated. Polio, targeted next, has been at the edge of zero for two decades — cornered but not finished, kept alive by war, rumour and mistrust in its final refuges. The smallpox veterans have spent careers explaining why their victory was singular: no animal reservoir for the virus to hide in, visible symptoms that made every case findable, lifelong immunity, a cheap heat-proof vaccine — and a geopolitical window in which rivals chose, once, to hunt the same enemy. The last question the story leaves is the one Henderson himself kept asking: eradication was achieved by people knocking on doors, over thirteen years, for the price of a weapons system. Given what became possible once — what, exactly, is our excuse now?
1. What happened in Birmingham in 1978, and what remains of the virus today?
2. Why has the success never been repeated, according to the veterans?
1. A laboratory escape killed Janet Parker — the disease's last victim — and the responsible professor took his own life. The virus now officially exists only in two guarded freezers, in Atlanta and Russia, with the destroy-or-keep debate still unresolved.
2. Smallpox was uniquely huntable: no animal reservoir, visible symptoms, lifelong immunity, a cheap stable vaccine — plus a rare geopolitical window of cooperation. Polio, by contrast, has been stuck at nearly-zero for decades, protected by war and mistrust.
This story is a chain of definitions: the disease that killed kings, the man who was the last case, the campaign, which nobody believed possible. Relative clauses are how English attaches identity to things — and this story cannot be told without them.
Complete with who, which, that, whose, where or when — and decide if commas are needed.
1. Jenner was the doctor experiment on an eight-year-old founded vaccination.
2. Merca, the last natural case appeared, is a port town in Somalia.
3. The bifurcated needle, any volunteer could learn in minutes, used a quarter of the old dose.
1. whose (no commas — it identifies which doctor) 2. where (commas — Merca is already identified) 3. which (commas — extra information, so "that" is impossible)
Join each pair with a relative clause. Write the full sentence, with commas only where they belong.
1. Ali Maow Maalin survived the mild strain. He spent his life campaigning against polio. →
2. The teams carried photograph cards. The cards showed the rash. →
3. The virus had no animal reservoir. That fact made eradication possible. (Use "which" for the whole idea.) →
1. Ali Maow Maalin, who survived the mild strain, spent his life campaigning against polio.
2. The teams carried photograph cards that/which showed the rash.
3. The virus had no animal reservoir, which made eradication possible.
Fill each gap with a relative pronoun (add commas in your head as you read), then read the whole label aloud.
Smallpox, killed some three hundred million people in the twentieth century alone, is the only human disease has ever been eradicated. The campaign achieved this ran from 1967 to 1977, led by teams tools were a photograph, a reward and a two-pronged needle. It ended in Somalia, a hospital cook named Ali Maow Maalin — a man had once avoided vaccination — became the last natural case on earth. The virus survives only in two freezers, the fate the world has debated ever since; 1980, the eradication was declared, remains the proudest date in public health.
which · that · that/which · whose · where · who · of which / that · when
Eight clauses, six different pronouns — and notice "which" after the comma, never "that".
Take the clauses into the Speak tab — Task A's story is a parade of people and places that need defining.
A note on the record: the numbers are rounded from WHO figures; the "two votes" and the Nigerian vaccine-shortage story come from participants' histories, above all Henderson's own — the victors wrote this history, though in this case the victory is checkable: the disease is, verifiably, gone.
All of it out loud, against the clock. Define as you go — every person, place and object in this story earns a relative clause.
Tell it as the epic it is: the monster that killed kings → the milkmaids and Jenner's terrible, wonderful experiment → the 1966 two-vote decision → the shortage in Nigeria that found the strategy → the photograph cards, the rewards, the needle → India's endgame → Rahima Banu, Ali Maow Maalin → Birmingham and Janet Parker → the two freezers → 1980, and Henderson's question.
Use at least five relative clauses — including one non-defining with commas and one which referring to a whole idea — and five key words (eradication, immune, ring vaccination, campaign, surveillance, strain, report, innovation, survivor, wipe out).
The World Health Assembly is about to decide by two votes. Round one: make the case FOR attempting eradication — the moral arithmetic, the reinfection risk, the ten-year plan. Round two: make the honest case AGAINST — the cost, the previous failed campaigns, the countries at war, the risk of a prestige disaster that discredits public health for a generation. Close with how you would actually have voted.
Pick a target — polio, measles, malaria, or a non-medical "disease" (corruption in one institution, plastic in one river, illiteracy in one district) — and design its eradication campaign Henderson-style: the surveillance, the ring, the reward, the tool built for the terrain, and the honest checklist of why it is or isn't huntable.
Or take a reflective prompt: