LONDON — Hopes are rising that a Covid-19 vaccine could be approved by the end of the year, with drugmakers and research centers scrambling to help bring an end to the pandemic.

Dozens of candidate vaccines are in clinical evaluation, according to the World Health Organization, with some already conducting late-stage tests before seeking formal approval.

The outcome of the trials is being closely monitored around the world.

The U.S.'s leading expert on infectious disease believes it will only be a matter of weeks before the findings of a potential vaccine will be known.

"We will know whether a vaccine is safe and effective by the end of November, the beginning of December," White House coronavirus advisor Dr. Anthony Fauci said in a BBC interview on Sunday.

"The question is: Once you have a safe and effective vaccine, or more than one, how can you get it to the people who need it as quickly as possible?"

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