COVID-19
Undetected bird flu cases prompt CDC to include exposed farm workers in testing despite their lack of symptoms.
Nearly all U.S. residents said they would take steps to protect themselves if wastewater monitoring data indicated disease transmission in their area.
The new vaccines aim to combat variants currently causing a summer wave of infections.
COVID-19 infections are likely growing in at least 39 states, causing patients to visit emergency rooms for the virus.
