The 2-dose oral vaccine had an efficacy of 73% in healthy volunteers who were exposed to Salmonella Paratyphi A, which causes paratyphoid fever.
The ACIP policymaking maturity rating fell from an overall score of 100% to 58% from April to September this year.
Adjusted effectiveness against emergency department visits/hospitalizations was 95% among patients aged 75 and older.
The study authors say the findings suggest that the shingles vaccine can prevent both infection and its complications.
No increased risk of congenital abnormalities was seen overall, by organ system, or for any of the 75 individual defects studied.
Researchers say the investigational three-strain vaccine produced a strong immune response and was well-tolerated in its first human trial.
Specialists with the Infectious Diseases Society of America said last week's meeting was a clear departure from ACIP's standard operating procedures and created more confusion.
Participants with health insurance and those with more years of education were more likely to be vaccinated after receiving a clinician recommendation.
The officials say they were removed from leadership positions over their objections to the Trump administration's hostility toward vaccines and suspension of funding for clinical trials and foreign research.
Pennsylvania, Colorado, and Massachusetts will allow pharmacists to provide updated COVID-19 vaccines to residents without a doctor's prescription.
