> Since the 1930s, it has been widely used as a preservative in a number of biological and drug products, including many vaccines, to prevent the growth of harm

> Since the 1930s, it has been widely used as a preservative in a number of biological and drug products, including many vaccines, to prevent the growth of harmful microbes inadvertently introduced into the vaccine during use. In case anybody wondered. He had said that he thinks no vaccines are safe and effective. These quotes are easy to find, I'm not sure how you could have missed them.