Charity’s boss tried to block her from speaking with the CDC, but she had gotten herself onto the first of these calls. She’d posed a rude question to the senior CDC official on the call: How can you keep saying that Americans are at low risk from the virus if you aren’t even testing for the virus? She’d been answered with silence, and then the official moved on to the next topic. “The single most important question is how many undetected cases are out there in our community,” said Charity, “and we don’t know.”