The reality is probably somewhere in between with some people being 100% protected and a small number with much lower protection.
As River mentioned, this was the reduction in reported symptoms during the trials last year. The situation this year is likely to be different due to the variants and also the length of time since people got their jab, with immunity levels likely to decline slowly over time, hence the possible requirement to get a further booster shot in the next 6-12 months
There are 2 ways to interpret this :
people will be 95% protected from Covid
95% of people will be protected from covid
The reality is probably somewhere in between with some people being 100% protected and a small number with much lower protection.
As River mentioned, this was the reduction in reported symptoms during the trials last year. The situation this year is likely to be different due to the variants and also the length of time since people got their jab, with immunity levels likely to decline slowly over time, hence the possible requirement to get a further booster shot in the next 6-12 months