Grammar Complete the text with the verbs in the box. Use Present Passive or Past Passive.
give, kill, make, need, not protect, not understand

Disease is one of man’s greatest enemies. Between 1347 and 1351, about 25 million people in Europe
(1) by the Black Death. Before vaccines, people (2) from
disease. The first vaccine (3) in about 1800, but the theory (4)
for another 50 years. Today, vaccines (5) to most children
in developed world, but more vaccines (6) in poorer countries.

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