Sen. Ron Johnson (R-Wis.) is challenging the heads of the top three federal health agencies to stop stonewalling Congress and explain why their vaccine safety and surveillance promises don’t match their actions. In a blistering July 13 letter made public late Wednesday, Johnson, the ranking Republican on the Senate Homeland Security and Government Affairs Committee, said he was encouraged in October 2020 by a videoconference among the National Institutes for Health (NIH), the Centers for Disease Control and Prevention (CDC), and the Food and Drug Administration (FDA). “A portion of that meeting detailed the multiple surveillance systems that would monitor the safety and efficacy of any vaccines” receiving federal approval in the treatment and prevention of the CCP virus that is also known as the novel coronavirus, Johnson told NIH Director Francis Collins, CDC Director Rochelle Walensky, and Acting FDA Commissioner Janet Woodcock. “In general, the vaccine surveillance plan described …