Scientists are closely monitoring a sub-variant of Omicron known as BA.2 which has spread widely in many countries around the world.
The rapid spread of BA.2 has led to concerns that it may be more transmissible and it has become known as the stealth variant as it is not as easily identified as a type of Omicron through PCR tests.
The UK Health Security Agency (UKHSA) previously declared it a 'variant under investigation' with experts closely monitoring its growth across countries.
