Late last month, the Centers for Disease Control and Prevention (CDC) told the story of a teacher in Marin County, California, who came to work one day in May feeling fatigued, with a little nasal congestion. She brushed it off as allergies.
The teacher, who was not vaccinated against COVID-19, took off her mask just long enough to read to the class during story time. Two days later, she tested positive for the virus. So did half her elementary school class of 24. And so did a total of 27 others in other classes, their parents, and siblings.