How the vaccine crossed the Atlantic
An A2 reading about the Balmis expedition, successive vaccinations, and the human side of the 1803 journey.
La vacuna cruzó el océano en una cadena humana
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1803 . . .
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About this article
Level A2 Reading focus
What you'll learn
Integrated narrative with imperfect, preterite, and present perfect.
The expedition kept vaccine material active through successive vaccinations and local networks.
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