Yet officials hope that the early signals that it is milder turn out to be accurate. Preliminary data from South Africa shows that hospitalization risk is 29% lower for omicron than other strains.
[ two dose vaccine 93% effective against severe infection for delta]
Also, a two-dose Pfizer vaccine was “33% protective” for infection and 70% effective at preventing severe cases.
These are straws in the wind. But, putting these two together, the risks for double vaccinated people are 0.71*0.67/0.07 = 6.7X higher for omicron than for delta.
Which is why so many countries are going for boosters, which raise ab level 2-3X higher than what it is after double vaccination and also broaden the antibody response.