SAN JOSE, Calif. — Santa Clara County health officials Tuesday said they have identified two COVID-19 cases of a worrisome sub-lineage of the fast-spreading omicron variant. Health officials had little information Tuesday about the two cases of the sublineage, known as BA.2, and said it’s not yet known whether it is more transmissible or virulent than the dominant omicron sublineage, known as BA.1. “The BA.2 sub-lineage is much rarer, but has begun to pop up in places, including California and Santa Clara County and other places around the world,” Santa Clara County Deputy Health Officer Dr. G…

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