https://www.washingtonpost.com/conte...-c6bc8426f688/
a few excerpts:
Important to update communications describing breakthrough cases as
“rare” or as a “small percentage” of cases
Increasing percentage of vaccinated persons
among those hospitalized in COVID-NET
▪ Delta is different from previous strains
– Highly contagious
– Likely more severe
– Breakthrough infections may be as transmissible as unvaccinated cases
▪ Vaccines prevent >90% of severe disease, but may be less effective at preventing
infection or transmission
– Therefore, more breakthrough and more community spread despite
vaccination
▪ NPIs are essential to prevent continued spread with current vaccine coverage