A nuance is that mainland vaccination (incl. up to booster) with the new-technology vaccines hasn't been as robust as without the mainland. I don't know if the

A nuance is that mainland vaccination (incl. up to booster) with the new-technology vaccines hasn't been as robust as without the mainland. I don't know if the conventional technologies that China is using for its domestic vaccines are also worse at controlling COVID symptoms (alongside being far less effective), but if that's the case Omicron poses a very real threat to China that other countries don't face.