Nine long years elapsed between the isolation of the measles virus in 1954 and the licensing of a vaccine. The world waited for 20 years between early trials of a polio vaccine and the first American licence in 1955.
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The Economist: The promise of the new covid-19 vaccine is immense
A nurse inoculates volunteer Ilya Dubrovin, 36, with Russia's new coronavirus vaccine in a post-registration trials at a clinic in Moscow on Sept. 10, 2020.
