The available vaccines are out because they are deemed safe for most of the populace, but there's always a risk as with anything. Still, while we should always seek to improve how things work, we've gotten much better on the regulations. The vaccines that have been banned historically wouldn't even reach the market nowadays. In many cases, though, people find it much too easy to blame vaccinations without conclusive evidence rather than other risks factors... like all the environmental toxins you've mentioned. We've been destroying the environment as we contaminate all the food we eat.

"The United States Public Service Act of 1944 mandated that the federal government issue licenses for biological products, including vaccines. After a poliovirus vaccine accident in 1954 (known as the Cutter incident), the Division of Biologics Standards was formed to oversee vaccine safety and regulation. Later, the DBS was renamed the Bureau of Biologics, and it became part of the Food and Drug Administration. It is now known as the Center for Biologics Evaluation and Research." ~ https://www.historyofvaccines.org/content/articles/vaccine-development-testing-and-regulation