I read some interesting statistics regarding breakthrough cases among the Washington, DC, population. More than 375,000 people in DC are fully vaccinated. There are 200 known breakthrough cases among them.
The following quotes come from a Washington Post article, which is probably behind a paywall:
https://www.washingtonpost.com/loca...2954a6-eaf6-11eb-8950-d73b3e93ff7f_story.html
"Of the 200 breakthrough cases, 57 percent had symptoms, 28.5 percent were asymptomatic. (For 14.5 percent, symptom status was not known.) Thirteen people were hospitalized with covid-19, or 6.5 percent of the breakthrough cases."
"Just 0.05 percent of the people who were fully vaccinated with the Pfizer-BioNTech vaccine tested positive, compared with 0.04 percent of those who received the Moderna vaccine and 0.12 percent of those who got the Johnson & Johnson shot."
Presumably there are more asymptomatic cases who were not tested. I'm curious what the testing circumstances were among the asymptomatic folks. There was one detail in the article which sounds dubious. A DC Dept. of Health official said that only 1% of the samples in DC were the Delta variant. It's 83% countrywide. According to CDC data, the mid-Atlantic region has a lower incidence of the Delta variant, but it's still around 66% of covid cases.
There were 4 deaths among the breakthrough cases, and all 4 had
"significant medical histories".
I tried unsuccessfully to find the DC government page which has these data.