The Philippines has detected the BA.1 and BA.2 or 'Stealth Omicron' sub-lineages of the Omicron variant.
Health Undersecretary Maria Rosario Vergeire stated that BA.2, nicknamed 'Stealth Omicron' by foreign scientists due to its genetic traits making it harder to detect using standard RT-PCR tests, is now predominant in most regions in the country.
The subvariant BA.1 has been detected in eight regions and is predominant in the Bicol region and among returning overseas Filipinos.
The Philippines now has 535 Omicron cases.
Vergeire noted that experts have yet to observe a significant clinical difference between BA.1 and BA.2, although further study is needed.
BA.2 has currently been identified in at least 49 countries and 17 US states.
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