HealthOregon is now tracking omicron subvariant BA.2By Alex Hasenstab (OPB)March 24, 2022 12:29 a.m.The subvariant BA.2 is being tracked separately from other Omicron subvariants 📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up