Health experts are monitoring a new Covid strain nicknamed “stealth Omicron” that appears to be more contagious.
Early data suggests that BA.2, a sub-variant believed to have emerged from a mutation of the Omicron coronavirus variant, may be both more transmissible and better able to evade vaccines than the more common BA.1 sub-lineage.
Currently the BA.1 lineage accounts for 98% of all cases globally but in Denmark, the BA.2 has grown rapidly.
