The House Oversight and Reform Select Subcommittee on the Coronavirus Crisis recently held a hearing with Dr. Deborah Birx, who served as the White House Coronavirus Response Coordinator under President Trump. Congressman Jim Jordan asked Birx if officials were lying or guessing when they told the public that people who received the COVID-19 vaccination couldn’t get or pass the virus after their compliance. Her response was that she did not know, but that she thought the assertion was based upon “hope.”
"I think it was hope that the vaccine would work in that way," she says.
https://www.c-span.org/video/?c5021092/dr-birx-knew-natural-covid-19-reinfections-early-december-2020