Los Angeles County Public Health issued warnings to avoid ocean waters at specific beaches due to hazardous ash from recent fires. Certain areas have been cleared as safe.

Los Angeles County issued a smoke advisory due to the Hughes Wildfire affecting air quality, with health officials advising residents, especially vulnerable populations, to stay indoors and limit physical activity.

MIT and Caltech scientists have developed a new vaccine designed to protect against multiple coronavirus variants by using nanoparticles with receptor-binding proteins.