“This report provided the most compelling information ever that the Covid vaccine was working as expected in the real world,” said CDC Director Dr. Rochelle Walensky on Friday.
The findings are based on an ongoing study of healthcare professionals in 25 states. This interim analysis included 1,843 healthcare data. Over 80% of the participants were women. From January to mid-March, about 623 workers tested positive. Studies have shown that fully vaccinated people are 94% less likely to develop symptomatological infections than their unvaccinated peers. The numbers are consistent with efficacy estimates from clinical trials.
Scientists have also found that a single dose of a two-shot regimen is 82% effective in preventing symptomatological infections. This number is higher than reported in other studies and may be the result of the relative youth of participants with a median age of 37-38 years. nyt