Gov. Baker Says He Expects J&J Pause to Cause ‘Minimal Disruption' to Mass. Vaccination Efforts. Massachusetts Gov. Charlie Baker. Gov. Charlie Baker said he expects "minimal disruption" to vaccine distribution in Massachusetts despite Tuesday's decision to pause the use of Johnson & Johnson vaccine at the recommendation of the federal government. He said the J&J doses make up only a small portion of the state's vaccine supply, so he doesn't expect the pause to have a major impact on Massachusetts. "We're basically on track with where we thought we would be back in December, despite some bumps along the way," Baker said. "The J&J and issues associated with that, the feds need to buckle down on that and decide how we should move forward. In the meantime, we have very significant Pfizer and Moderna supplies and we expect that to continue."