re: **CORRECTION** 40% of people being admitted to UK hospitals for COVID-19 are vaccinated

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"Vaccines for human diseases are the least expensive, most effective public-health interventions we have ever had," Read said. "But the concern now is about the next-generation vaccines. If the next-generation vaccines are leaky, they could drive the evolution of more-virulent strains of the virus." He said it is critical now to determine as quickly as possible that the Ebola vaccines that now are in clinical trials are not leaky -- that they completely prevent the transmission of the Ebola virus among people. "We do not want the evolution of viral diseases as deadly as Ebola evolving in the direction that our research has demonstrated is possible with less-than-perfect, leaky vaccines," Read said.

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