U.S. Sen. Ron Johnson will lead a roundtable discussion, COVID-19 Vaccines: What They Are, How They Work, and Possible Causes of Injuries Posted on 12/07/202212/07/2022 By paulmenjr No Comments on U.S. Sen. Ron Johnson will lead a roundtable discussion, COVID-19 Vaccines: What They Are, How They Work, and Possible Causes of Injuries Ciencia, COVID - 19 Injuries