Worse Than Horse Deworming Paste - CDC And Media Again Caught Prevaricating And Propagandizing

nakedcapitalism  |  Last Friday, the CDC published “Outbreak Associated with SARS-CoV-2 B.1.617.2 (Delta) Variant in an Elementary School — Marin County, California, May–June 2021” (“Outbreak”). This got a lot of play in the Northern California press, with a good deal of reporting done (or at least original stories written), because the study was led by Marin County Public Health, and they with other California epidemiologists and experts wrote the study up and then submitted it to the CDC, which accepted it. Good for them! However, there is a question “Outbreak” does not ask, and that the press did not ask. Carefully avoiding spoilers — though few NC readers will be surprised at the plot twist — I will first quote the “Outbreak” on the incident. Then I will switch into media critique mode, and present the headlines from Northern Califonia. After that, I will present the implications drawn from the outbreak by the press (which are more broad spectrum than the headlines). Finally, I will give the unasked question from “Outbreak” a thorough airing, and conclude.

Here is what “Outbreak” says in the “Investigation and Findings” section:

The outbreak location was an elementary school in Marin County, California… Each grade includes 20 to 25 students in single classrooms. Other than two teachers, one of whom was the index patient, all school staff members were vaccinated (verified in California’s Immunization Registry). The index patient became symptomatic on May 19 with nasal congestion and fatigue. This teacher reported attending social events during May 13–16 but did not report any known COVID-19 exposures and attributed symptoms to allergies. The teacher continued working during May 17–21, subsequently experiencing cough, subjective fever, and headache. The school required teachers and students to mask while indoors; interviews with parents of infected students suggested that students’ adherence to masking and distancing guidelines in line with CDC recommendations (3) was high in class. However, the teacher was reportedly unmasked on occasions when reading aloud in class. On May 23, the teacher notified the school that they received a positive result for a SARS-CoV-2 test performed on May 21 and self-isolated until May 30. The teacher did not receive a second COVID-19 test, but reported fully recovering during isolation.

The index patient’s students began experiencing symptoms on May 22. During May 23–26, among 24 students in this grade, 22 were tested…. Twelve (55%) of the 22 students received a positive test result, including eight who experienced symptom onset during May 22–26. Throughout this period, all desks were separated by 6 ft. Students were seated in five rows; the attack rate in the two rows seated closest to the teacher’s desk was 80% (eight of 10) and was 28% (four of 14) in the three back rows…

On May 22, students in a another classroom, who differed in age by 3 years from the students in the class with the index case and who were also ineligible for vaccination began to experience symptoms. The two classrooms were separated by a large outdoor courtyard with lunch tables that were blocked off from use with yellow tape. All classrooms had portable high-efficiency particulate air filters and doors and windows were left open. Fourteen of 18 students in this separate grade received testing; six tests had positive results. Investigation revealed that one student in this grade hosted a sleepover on May 21 with two classmates from the same grade. All three of these students experienced symptoms after the sleepover and received positive SARS-CoV-2 test results. Among infected students in this class, test dates ranged from May 24 to June 1; symptom onset occurred during May 22–31.

So that’s the outbreak. Here are the headlines:

• CDC: Unvaccinated Marin County teacher caused big COVID-19 outbreak in school San Francisco Chronicle
• CDC study finds unvaccinated Marin Co. teacher infected 22 elementary school students with COVID ABC7
• CDC report confirms unvaccinated Marin County teacher was source of Delta variant outbreak KTVU
• CDC study shows unvaccinated teacher started Delta COVID outbreak at Marin school KSBW
• One Unvaccinated Teacher In Marin School Seeded COVID Outbreak That Infected Over a Dozen Students, Their Siblings, and Parents SFist
• How 1 unvaccinated Marin County teacher started a delta variant outbreak: CDC study KRON4

There is a unanimity of opinion by the headline-writing editors that the source of the problem was the index case: the unvaccinated teacher. Indeed, that’s without justification — that is, is not only a matter of aghastitude — given the “Implications for Public Health Practice” in the Summary section of “Outbreak”:

Vaccines are effective against the Delta variant, but transmission risk remains elevated among unvaccinated persons in schools. In addition to vaccination, strict adherence to multiple nonpharmaceutical prevention strategies, including masking, are important to ensure safe school instruction.

(I presume the Summary is tacked on to the submitted study by CDC.) Now let’s turn to the bodies of the stories, where there is a broader spectrum of opinion than in the headlines.