As a result, it likely will take a couple of days to determine whether the change in California’s status is the result of a blip in data or represents a true change in conditions. The CDC updates its tier assignments for each state every evening Monday through Saturday. It was not immediately clear whether data-processing delays were a factor in California’s lower rate of community transmission. Los Angeles County did not report any cases Saturday or Sunday because of a planned system upgrade. Nonetheless, the trend in new weekly coronavirus cases headed into last weekend suggests a notable decline in recent weeks, which could bring eventual relief to areas like the Central Valley and rural Northern California, where many hospitals are still overwhelmed by COVID-19 patients.
Mask orders are in place in counties where a majority of Californians live, but there is no statewide order requiring indoor mask use in public settings. California is “the only large state to improve from red to orange COVID-19 community levels of transmission,” state epidemiologist Dr. Erica Pan said in a tweet Monday night. She credited relatively high vaccination rates, as well as indoor masking practices, in helping drive down new coronavirus infections.
California entered the second-highest tier of coronavirus transmission on Monday night, a tier it shared with just two other states, Connecticut and Vermont, as well as the District of Columbia and Puerto Rico. By Tuesday night, Connecticut, Vermont and the District of Columbia had fallen back into the worst tier. As of Tuesday night, California is the only state that has fallen into this category, as has Puerto Rico. The CDC’s scale evaluating coronavirus transmission levels categorizes states as being in one of four tiers: the worst — high — is color-coded as red; followed by substantial (orange), moderate (yellow) and low (blue).
A nurse cares for a COVID-19 patient in the intensive care unit at Adventist Health in late August in Sonora, Calif. (Nic Coury / AFP/Getty Images) The nation as a whole is also seeing new weekly coronavirus cases begin to fall. About 118,000 new coronavirus cases a day were reported across the U.S. over the seven-day period that ended Sunday; the previous week’s average was about 152,000 cases a day.
Over the same period, the San Francisco Bay Area reported a decline in weekly cases of 36%; Southern California, 28%; the Greater Sacramento area, 27%; the San Joaquin Valley, 18%; and rural Northern California, 15%. As of Friday night, California reported a 27% decline in weekly cases over the last two weeks, from an average of 13,400 cases a day for the seven-day period that ended Aug. 27 to about 9,800 cases a day for the week that ended Friday, according to a Los Angeles Times analysis of data provided by the state Department of Public Health.
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