Art Moore – October 28, 2021
The analysis, published Thursday in The Lancet Infectious Diseases medical journal, covered the period of Sept. 13, 2020, to Sept. 15, 2021.
It found that vaccinated people transmitted a delta variant infection to others at a rate of 25% . For the unvaccinated, the rate was 23%.
The delta variant is by far the most common source of COVID-19 disease around the world. In the United States, it comprises 99% of novel coronavirus cases, according to the Centers for Disease Control and Prevention.
A co-leader of the new study, Ajit Lalvani, a professor of infectious diseases at Imperial College London, said the findings “show that vaccination alone is not enough to prevent people from being infected with the delta variant and spreading it in household settings.”