Washington: Dr Anthony Fauci says by the end of this year government scientists should know whether they have a safe and effective vaccine for COVID-19.
Fauci is among top officials testifying before the Senate Health, Education, Labour and Pensions committee on Wednesday.
As the government's leading infectious disease expert, Fauci has been a realist about the dangers of the coronavirus but also optimistic about the prospects for a vaccine.
Fauci says people who recover from the virus develop antibodies against it, which gives him confidence a vaccine that triggers the immune system will work.
Fauci says several kinds of vaccines are in final-stage testing in the US. A single-dose candidate is the most recent trial, which requires thousands of volunteers. (AP) SCY SCY
This story has been published from a wire agency feed without modifications to the text. Only the headline has been changed.
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