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The day of a successful vaccination – level 1
14-05-1796Smallpox is a very dangerous illness. It kills people. Cowpox is...
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 the first tourist went to space – level 2
28-04-2001People were always fascinated by the night sky full of stars....
The day the first tourist went to space – level 3
28-04-2001People were always fascinated by the night sky full of stars....
