Several sources, including the World Health Organisation, have expressed concern about the increase in Covid-19 infections in China and parts of Europe over the past two weeks, attributing it to a "stealth Omicron" variant of the coronavirus.
People infected with the highly contagious Omicron variant of Covid are less likely to contract BA.2 subvariant, according to a study.Omicron, which has rapidly spread worldwide, carries numerous mutations in key regions and is associated with increased transmissibility and immune escape. 📰 After Omicron Variant of COVID-19, Risk of BA.2 Subvariant Is Rare, Says Study.