“We conclude that Omicron BA.2 is inherently substantially more transmissible than BA.1, and that it also possesses immune-evasive properties that further reduce the protective effect of vaccination against infection,” the study’s researchers said.
The study, which has not yet been peer-reviewed, was conducted by researchers at Statens Serum Institut (SSI), Copenhagen University, Statistics Denmark and Technical University of Denmark.
“If you have been exposed to Omicron BA.2 in your household, you have 39 per cent probability of being infected within seven days. If you instead had been exposed to BA.1, the probability is 29 per cent,” lead study author Frederik Plesner told Reuters.
That suggests BA.2 is about 33 per cent more infectious than BA.1xjmtzyw, he added.
