The devils cycles (red reinforcing feedback loops) are the cause to the symptom of vaccinated people getting infected anyway. Interestingly, the proportion is extremely low as we see from figures from countries where just half the population is vaccinated. Only in countries with higher rates of vaccination the rates of vaccinated people that get infected rises. Logical, yet media sells figures like "40 percent of new infections in Britain are vaccinated" interpreted by people as vaccinations don't help anyway.
.... added arguments around mild symptoms which tempt officials and the public to live with increased rates of infections.