Obernolte and Lucas Request Information on Administration’s Decision to Halt Use of J&J Vaccine 117th Congress COVID-19 (Coronavirus) April 20, 2021 View the letter HERE. The letter was sent on April 20, 2021. Permalink: https://science.house.gov/2021/4/obernolte-and-lucas-request-information-administration-s-decision-halt-use-jj-vaccine