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Several virus variants may reduce vaccine effectiveness - UK chief medical officer

LONDON, Feb 15 (Reuters) - There are several variants of thecoronavirus that might reduce the effectiveness of vaccines,England's Chief Medical Officer Chris Whitty said on Monday.

"There were several variants that look very similar to oneanother in many ways, which actually could have slightly reduced... or in some cases, more than slightly reduced, effectivenessfrom the vaccine," Whitty said.

"In which case ... scientists redesign the vaccine, and thatallows to re-vaccinate against the new variant."(Reporting by Guy Faulconbridge, writing by William James)