No FDA-approved rapid tests exist that specifically test for H5N1, and the first near-point-of-care test for mpox was approved by the WHO only in late October. Without widespread testing, we don’t know the true number of infections, don’t catch dangerous mutations early on, and can’t identify hotspots fast enough to contain the outbreak.

The recommendation follows the release of a new Morbidity and Mortality Weekly Report conducted by the Centers for Disease Control and Prevention (CDC) showing some dairy workers have been unknowingly infected with the virus. In the report, officials write ...