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The day of a successful vaccination – level 2
14-05-1796Smallpox was a very dangerous disease which killed millions of people....
The day of a successful vaccination – level 3
14-05-1796Smallpox was a deadly and highly infectious disease that had killed...
The day a computer beat the best chess player – level 3
11-05-1997In 1996, IBM built a supercomputer. They approached the world champion,...
The day Nelson Mandela became president – level 2
10-05-1994Nelson Mandela was born in times when the white people lived...
The day Nelson Mandela became president – level 3
10-05-1994Nelson Mandela was born in times when the whites lived in...
The day of the U-2 incident – level 2
01-05-1960On May 1, 1960, an American spy plane was flying over...
The day of the U-2 incident – level 3
01-05-1960On May 1, 1960, an American U-2 spy plane was flying...
The day HIV was discovered – level 1
23-04-1984In 1981, five men from Los Angeles have a strange disease....
The day HIV was discovered – level 2
23-04-1984In 1981, doctors found that five men from Los Angeles had...
The day HIV was discovered – level 3
23-04-1984In 1981, five men from Los Angeles were reported to have...
