The BA.2 subvariant of Omicron is likely to spread globally, however it remains unclear whether it will cause reinfection among those infected with the original Omicron strain, according to the World Health Organisation.

According to Maria Van Kerkhove, the WHO's Covid-19 technical lead, the BA.2 subvariant, which is more contagious than the currently dominant BA.1 version, will likely become more common, CNBC reported.