More contagious subvariants on radar Omicron BA.4 and BA.5 flagged as risky Thailand has recorded 49 new cases of the two new Omicron subvariants — BA.4 and BA.5 — which are considered more contagious and can potentially bypass immunity, according to the Centre for Medical Genomics of Ramathibodi Hospital. Wasun Chantratita, who heads the centre, said 26 cases of BA.5, 23 cases of BA.4 and 18 cases of BA.2.12.1 have been detected in the kingdom since April. He cited data from Gisaid, the global data science initiative, to back up his remarks. Dr Wasun said the figure was based on random tests …

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