:
1. Unvaccinated individuals were more likely to be infected by both variants and also had "higher transmissibility" in comparison to vaccinated individuals, but they were just as vulnerable to omicron as they were to delta.
2. Vaccine effectiveness was reduced to around 40% against symptoms and 80% against severe illness for omicron in the fully vaccinated. Booster shots increased those numbers to 86% and 98% respectively.
3. Booster-vaccinated individuals were not only well-protected against hospitalization, but they were also less likely to transmit the virus compared to individuals who had received two doses, according to the study. Unvaccinated people were most likely to transmit the virus.