Why are so many first responders and health care workers risking their careers rather than taking the vaccine?

The heroes of 2020, our health care workers and first responders, who were risking their lives, taking the threat from the coronavirus head on before there was any vaccine are now risking their very careers rather than taking the vaccine. Do they know something that the CDC, NIH and the media are withholding from us?

The world is full of conflicting information and it is difficult to separate facts from opinions and just plain rumors? Being an octogenarian, fully vaccinated with Pfizer, should I take a booster shot, or should I pin my hopes on NIH and CDC approving additional early therapeutics, such as Ivermectin, Hydroxychloroquine or monoclonal antibody therapy to fend it off should I get early symptoms? Here are early results from Israel in using a booster shot compared to Sweden, also a country with greater than 70% vaccination rate:

For health care workers in their reproductive years one question that is now readily available since they have all the data on adverse reactions from the vaccine, would be: What is the miscarriage rate? Is it larger than for the population in general? Until that, and many more questions are answered I will not even take a booster shot, even though I am for vaccination of people over 45, since the death rate from COVID increase by about 7% for every year you age.

For NIH and CDC, show us the data, we have some data on myocarditis, how it is highest in teenage boys and tamper of with age, but the data on miscarriages are still lacking. Future sterility takes some time to determine, but like with so many viruses, to have had the disease during pregnancy is usually worse than taking the vaccine.