In the COVID-19 pandemic era, at-home, portable tests were crucial for knowing when to wear a mask or isolate at home. Now, ...

Respiratory illness activity remains high across the country, according to the latest data from the Centers for Disease Control and Prevention.

CDC testing data for the same period reveals that 6.6 percent of COVID-19 tests came back positive, with Illinois, Indiana, Michigan, Minnesota, Ohio and Wisconsin seeing the highest test positivity ...

Respiratory viruses are continuing to spread across the United States and such activity "is expected to continue for several ...

The World Health Organization said in January 2025 that China's reported levels of acute respiratory infections, including ...

Whether Covid-19 was unleashed by a laboratory mishap or spilled over from animals remains an enduring, fiercely contested ...

Active galactic nuclei (AGN) are among the most energetic phenomena observed in the universe. These luminous objects, powered ...