“
Studies from India with vaccines not authorized for use in the United States have noted relatively high viral loads and larger cluster sizes associated with infections with Delta, regardless of vaccination status,” the guidelines state.
“These early data suggest that breakthrough Delta infections are transmissible. Unpublished data are consistent with this, and additional data collection and studies are underway to understand the level and duration of transmissibility from Delta vaccine breakthrough infections in the United States and other settings,” they add.
The first paragraph links to a footnote that links to a study at
Research Square. However,
the study appears to be “Under Review,” not rejected: