Scientists are closely monitoring a sub-variant of Omicron Covid-19 after it spread widely and quickly across the world.
BA.2 has been labelled a stealth variant due to difficulties in picking it up on a PCR test, and its rapid spread has led to fears it may be more transmissible as it is not as easily identified when it is picked up.
Experts are closely monitoring its growth across countries after it was declared a 'variant under investigation' by the UK Health Security Agency (UKHSA), HullLive reports.
