CHICAGO (CBS) — A California family that attended a big wedding in Milwaukee says the joyous occasion turned into a hotbed for a superspreader.

The family was in Milwaukee last weekend for the wedding.

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Now 12 of them are infected with COVID-19, and five of them have the Omicron variant.

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The Wisconsin Department of Health Services says everyone was vaccinated and most had boosters.

None of the wedding attendees wore masks.

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All of their symptoms are mild.