"minimal" levels of the virus have been detected, as of October 31. But as of November 1, mask mandates were introduced in the following California counties. But to whom will they apply?

In Southern California, the only change was in San Diego County, which is also being moved from "red" to "purple." See how that affects each county's ability to reopen businesses here. MAP ...

Get top local stories in Southern California delivered to you every morning. Sign up for NBC LA's News Headlines newsletter. The map below shows where each county falls within the tiered system as ...

As of Tuesday, Dec. 1, California ... counties in purple, 11 counties in red, four in orange, two in yellow. Counties are assigned to a tier based on metrics showing the speed and the spread of ...

County Map of Cases and Deaths in California About this Data: The map shows coronavirus cases and deaths assigned to each county. Population data used for per 100K calculations comes from the U.S ...

As of Tuesday, April 20, the California ... 11 counties in red, four in orange, two in yellow. Counties are assigned to a tier based on metrics showing the speed and the spread of the virus ...

In four Southern California counties — Imperial ... four-tier reopening road map, which determines how widely individual counties can reopen businesses and other communal spaces.

The CDC updates its map of community transmission levels every Thursday. If the spread of the virus worsens, several more California counties that are currently labeled as “moderate” could be ...

More parts of California will be ... concern that new variants of the virus threaten to imperil that progress. According to the latest state data, seven counties will move from the purple tier ...