- For those who are vaccinated and have been ill, Omicron is more dangerous than Delta in terms of possible hospitalization.
- For those who have made a booster, this risk is much lower.
- But even with a booster, it is higher than with Delta.
- The highest risks of hospitalization are when a person without immunity (from vaccination or from a disease) meets Delta. When a person without immunity meets Omicron, the risks are slightly lower. For those who are immune, the risks are about ten times lower when encountering Delta and about three times lower when encountering Omicron.
In short: vaccination really lowers your risks to get Delta, but it's absolutely useless against Omicron and further mutations of COVID-19.
BTW, QR coders are useless too, because the chance that a vaccinated person is an infected disseminator of the virus are the same as if he/she is not vaccinated.