While European schools returned to teaching children in person, American schools and teachers' unions were demanding remote teaching and, once back in school, physical barriers between each student and HEPA filters in every classroom. Was there data backing up these demands? No, but there was a "source”: a 14-year-old girl. The daughter of a man named Robert Glass produced a 2007 computer “model” that claimed that in the event of a pandemic:

'closing schools and keeping students at home during a pandemic would remove the transmission potention... and would be effective at thwarting its spread within a community'.

The CDC was eager to adopt the Glass model as a standard. The CDC produced two policy reports using Laura Glass’s school project as a basis for closing America down. Using a dearth of hard data, the Glasses concluded that schools “form the backbone” of viral spread in an epidemic. Robert Glass claimed that by closing schools, businesses could stay open. Was this based on data? No, but the CDC used it anyway in two reports.

Contained in the CDC report(s) was a footnote. Zweig dove into the footnote rabbit hole. Six links later, he found the wellspring. The claim was based on nonsense:

“Our assumption is the 37% of transmission occurs in the contexts, with the within-school transmission coefficient being twice that of the within-workplace coefficient. However this choice is arbitrary” (page 25) //

Zweig also blames TDS. He notes that at one point, the American Academy of Pediatrics forcefully recommended that schools reopen. When Trump recommended the same thing, the Academy changed direction – U-turning soon thereafter (with the help of teachers' unions). It became a binary choice. If Trump recommended something or agreed with doctors, it must be “bad” (pages 147-149).

“An Abundance of Caution” is worth the time, but only if you are willing to read about a year-long trainwreck and how “experts” ruined lives.