US researchers have discovered a more aggressive strain of coronavirus, but Australian experts say it’s not time to panic.

Almost a third of the COVID-19 infected patients studied by the Los Alamos National Laboratory were carrying the new, more contagious strain, but the research is yet to be peer-reviewed.

University of Sydney immunisation expert Professor Robert Booy told Ben Fordham the second strain isn’t even a new mutation.

“That strain has been there since the beginning … and neither of them are really very different from each other.”

He assured listeners there’s no additional danger from this strain, nor will it slow down the search for a vaccine.

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