Disappointing Chinese Vaccine Results Pose Setback for Developing World

Sui-Lee Wee and Ernesto Londoño, New York Times |

Image by fernando zhiminaicela from Pixabay

Scientists in Brazil have downgraded the efficacy of a Chinese coronavirus vaccine that they hailed as a major triumph last week, diminishing hopes for a shot that could be quickly produced and easily distributed to help the developing world.

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