Part 3 — History of Vaccination (Lịch sử tiêm chủng)
Bài giảng về lịch sử phát triển vắc-xin — chủ đề y tế khoa học. Bài này kiểm tra khả năng theo dõi trình tự thời gian và hiểu thuật ngữ chuyên ngành.
"Good morning, everyone. Today's lecture is about one of the greatest achievements in medical history: vaccination. The story of vaccines is a fascinating journey that has saved millions of lives.
Before vaccines existed, diseases like smallpox killed millions of people every year. In the 18th century, smallpox alone had a mortality rate of about 30 percent — meaning roughly one in three infected people would die.
The breakthrough came in 1796 when an English doctor named Edward Jenner made a remarkable observation. He noticed that milkmaids who had caught cowpox — a mild disease from cows — seemed to be immune to smallpox. Jenner took material from a cowpox sore and inoculated a young boy. Later, when the boy was exposed to smallpox, he did not get sick. This was the world's first vaccine.
The word 'vaccine' actually comes from the Latin word 'vacca,' meaning cow — a reference to Jenner's cowpox experiment.
Over the next two centuries, scientists developed vaccines for many deadly diseases: polio, measles, tetanus, and many others. Perhaps the greatest achievement was the complete eradication of smallpox in 1980. This was the first time humanity had deliberately wiped out a disease.
Today, vaccination programs around the world prevent an estimated 2 to 3 million deaths each year. However, challenges remain — some communities still lack access to basic vaccines, and misinformation about vaccine safety continues to be a problem."
5 câu hỏi trắc nghiệm
Câu 21: What is the main topic of this lecture?
A. The biography of Edward Jenner
B. Modern medicine techniques
C. The history and impact of vaccination
D. How to prevent cowpox
Câu 22: What was the mortality rate of smallpox in the 18th century?
A. About 10 percent
B. About 30 percent
C. About 50 percent
D. About 70 percent
Câu 23: How did Jenner discover the vaccine?
A. He found a cure in tropical plants
B. He observed that milkmaids with cowpox were immune to smallpox
C. He accidentally mixed two chemicals
D. He studied ancient Egyptian medicine
Câu 24: When was smallpox eradicated?
A. 1796
B. 1900
C. 1950
D. 1980
Câu 25: What challenge does the speaker mention about vaccination today?
A. Vaccines are too expensive to produce
B. Some communities lack access and misinformation is a problem
C. Scientists cannot develop new vaccines
D. Governments have banned vaccination programs
Đáp án và giải thích
Câu 21: C — The history and impact of vaccination
Bài giảng trình bày từ thời trước vắc-xin → Edward Jenner → phát triển đến nay. Đây là bài về lịch sử và tác động của tiêm chủng.
Câu 22: B — About 30 percent
Transcript nói: "smallpox alone had a mortality rate of about 30 percent."
Câu 23: B — He observed that milkmaids with cowpox were immune to smallpox
Transcript: "He noticed that milkmaids who had caught cowpox seemed to be immune to smallpox."
Câu 24: D — 1980
Transcript: "the complete eradication of smallpox in 1980." Chú ý: 1796 là năm Jenner tạo vắc-xin đầu tiên, không phải năm xóa sổ bệnh.
Câu 25: B — Some communities lack access and misinformation is a problem
Transcript: "some communities still lack access to basic vaccines, and misinformation about vaccine safety continues to be a problem."
Từ vựng quan trọng
| Từ | Nghĩa | Ngữ cảnh trong bài |
|---|---|---|
| vaccination | tiêm chủng | one of the greatest achievements |
| smallpox | bệnh đậu mùa | killed millions of people |
| mortality rate | tỷ lệ tử vong | mortality rate of about 30 percent |
| immune | miễn dịch | seemed to be immune to smallpox |
| inoculate | tiêm phòng | Jenner inoculated a young boy |
| eradication | xóa sổ | complete eradication of smallpox |