If you have the vaccine, then you shouldn't be worried about me.
Schrödinger's vaccine. It works and it doesn't work at the same time.
Does the vaccine work or not?
The vaccine used to be about 90% effective against infection and about 90% effective against hospitalization and deaths.
But now, the delta variant is by far the most common variant of COVID circulating around the world, so those numbers have changed.
Against the delta variant, our vaccines are anywhere from 40 to 80% effective (probably on the lower end) against infection but fortunately still about 90% effective against hospitalization and death.
On an individual level, getting the vaccine reduces one's chance of harm quite significantly, but it's not guaranteed, and there are more things one could do to limit their vulnerability, like wearing a mask, improving their health, or social distancing.
But we live in a society, and thus the actions of other people must be factored in.
On a community level, the vaccine reduces the community's chance or harm significantly, and the greater a percentage of the community is vaccinated, the greater compounding beneficial effect it has. Even though the infection protection is lower for delta, it's still greater than zero, which means that when analyzed via the math of an exponentially spreading virus, that will still have a very large effect over a large population.
Therefore, it is in the best interests of the community to have as high a vaccination percent as possible. Therefore, those who do not get vaccinated are increasing the danger for the entire community.
The known risks of COVID in the short term are extremely large. The known risks of the vaccine in the short term are extremely low.
The known risks of COVID in the long term are extremely large. The long term risks of the vaccine are currently unknown, but theoretically extremely low based on sound reasoning.