CURRENTGLOBAL Singapore reports three local Covid-19 positive cases for Omicron BA.4, BA.5 variantsEditor Selangor JournalMay 16, 2022 by Editor Selangor JournalMay 16, 2022 SINGAPORE, May 16 — Singapore has detected two local Covid-19 cases infected with the BA.4 variant, and one local case infected with the BA.5 variant,...