If your local health authority depends from a democratically elected body and is monitored by an independent body, then yeah, common sense indicates that I should trust their judgements in general terms.
This is not to say you should not be vigilant, but in general terms if you are not vigilant you are still likely to be OK (the decrease of infant mortality, longer life spans and better conditions of life later in life are proof that such optimism is not misplaced).
In other places you may have no choice: health service would be so precarious that it would not be a major concern, or you would be forcibly vaccinated to protect the fatherland.
So at the end, yeah, you as an individual have limited choice, because whatever the quality of your society you live on one and your choices don't take place in a vacuum (the day they do you are most welcome to do whatever you see fit), by limiting our choices within reasonable limits we benefit from joint action against diseases.
If everybody acts on his own, we can as well go back to the Middle Ages and wait for the next bout of the pest.