Category Archives: San Francisco Bay Area

Entire Bay Area is back in CDC’s orange and red tiers for COVID spread, Solano & Sonoma only counties in red

Entire Bay Area is back in CDC’s orange and red tiers for COVID spread

San Francisco Chronicle, by Kellie Hwang, Nov. 2, 2021
Piper Lind wears a mask and decorated costume while welcoming masked customers to Cliff’s Variety on Castro Street in San Francisco on Wednesday, Oct. 6. Jessica Christian/The Chronicle

The entire Bay Area has returned to the Centers for Disease Control and Prevention’s orange “substantial” and red “high” categories of coronavirus transmission — a step backward for some counties, like Marin and San Francisco, where transmission was previously classified as yellow, or “moderate.”

This comes after Marin County lifted its indoor mask mandate on Monday after reaching key COVID-19 benchmarks agreed upon by eight Bay Area counties. However, the mandate is unlikely to be immediately reinstated; the county’s health officer Matt Willis said last week that an increase in cases alone will not determine whether masks come back; rather he will watch hospitalization numbers, which as of Friday were at a four-month low.

San Francisco had reached the “moderate” level last week, but reverted to “substantial” on Tuesday.

The entire Bay Area has returned to the CDC's orange 'substantial' and red 'high' categories of transmission.
The entire Bay Area has returned to the CDC’s orange ‘substantial’ and red ‘high’ categories of transmission. Centers for Disease Control and Prevention

Under a framework agreed to by eight Bay Area counties, a county may lift its indoor mask mandate for fully vaccinated people when: 1) its vaccination rate reaches at least 80% or enough time has passed that children 5-11 years old can be fully vaccinated; 2) the county has been in the CDC’s yellow “moderate” level of community transmission for at least three weeks — with tiers defined by case rates and positive test rates; and 3) hospitalization rates remain low.

Four counties — Alameda, Contra Costa, San Francisco and Sonoma — have already eased some rules, allowing fully vaccinated people to go without masks in certain indoor settings including gyms, offices and college classrooms. But masks remain mandatory in shops, restaurants and bars in those counties.

Masks remain optional for vaccinated people in Solano County, the only part of the Bay Area not to reinstate a mask mandate.

In recent weeks, the rate of new coronavirus cases per day has been under 10 per 100,000 people in most Bay Area counties — a rate not seen since mid- to late July, after the delta variant became the dominant strain in California and drove a new surge in cases.

Santa Clara and Marin counties were the first to consistently drop below 10 cases per 100,000, on Sept. 24, and Solano County was the latest, on Oct. 16. Only Sonoma’s case rate is over 10, having trended upward since the beginning of last week. The overall Bay Area case rate is 8.2 cases per 100,000, compared to the statewide case rate that is nearly double that, at 14.34.

At the same time, case rates have largely plateaued in the Bay Area’s counties, much as they have across California, which raises questions about what might happen as we approach the busy holiday season that will increase travel and send people indoors.

Peter Chin-Hong, an infectious disease expert with UCSF, said he doesn’t suspect Halloween will result in a significant uptick in cases because it is “generally a local event, and with high vaccination rates not just in adults, but in adolescents in the Bay Area,” which creates a wall of immunity around younger children.

He said there could be a small uptick in cases during the holidays due to travel to areas with higher transmission rates; waning vaccine immunity; and a more substantial flu season that could increase people’s susceptibility to COVID-19.

“I don’t think this plateau will lead to a surge remotely close to what we saw last winter,” Chin-Hong wrote in an email. “With the approval of vaccines in children 5-11, this will further boost community immunity to keep cases down.”

Here is where each Bay Area county stands on COVID metrics and the mask mandate criteria as of Nov. 2.

Note: The 7-day average case rates are from Nov. 1 and come from state data. The weekly new cases per 100,000 over the past seven days and positive test rates are from the CDC.

Benicia physician Richard Fleming: Comparing Solano County’s COVID numbers to other Bay Area counties

Solano County covid-19 numbers

Benicia Nextdoor, by Dr. Richard Fleming, September 8, 2021
Dr. Richard Fleming, Benicia

There are 9 counties in the Bay Area. In 7 counties, covid-19 cases per 100K are declining. In Contra Costa, the case rate has increased by 4%. In Solano, the case rate has increased by 41%. Our case rate is 59 per 100K. The next highest in the Bay Area is 35.

As far as covid-19 hospitalizations, 4 counties are flat or declining. Solano is among the 5 counties seeing hospitalizations increasing. We now have 30 people hospitalized per 100K. The next highest county is 27. Most Bay Area counties are much lower.

The mortality rate in Solano County is 32% higher than the next highest county.

As far as vaccinations, 53% of our population is fully vaccinated. The other 8 counties range between 65% and 76%.

It has been said by some that we are not like the other 8 Bay Area counties. I have to say I don’t understand that statement. As far as our covid-19 metrics, it is clearly true. But I feel Solano County should be able to counter this virus as well as our neighbors in the bay. There is no reason for us to concede that we are, for some reason, incapable of protecting ourselves as well as our peers to the south and the west.

BenIndy editor: for Solano County data, go to

Benicia physician cites data on mask mandates

Solano Public Health Director opposes mask mandates

By Richard Fleming, MD, September 2, 2021

[BenIndy Editor:  Dr. Fleming slightly modified his analysis here from the piece that appeared in today’s Vallejo Times-Herald.  This updated version is published here with permission.  – R.S.]

Richard Fleming, M.D., Benicia CA

The Vallejo Times-Herald carried an interview with County Public Health Director Bela Matyas on August 29. In it, he explained why he opposes a county mask mandate for indoor public settings and why he feels the recent decision by the Benicia City Council to establish a mask mandate was “unnecessary.”

Dr. Matyas indicated he was looking at three factors – politics, community consensus, and science. He stated there is no consensus on masking in the county so, “My decision is purely based on science.” Yet in that interview, Dr. Matyas offered no scientific data.

These comments echo comments he made before the Benicia City Council on August 24. At that meeting, Matyas said there is no evidence mask mandates work. According to him, if they did, then the disease curve in Solano County would look different than in the eight other Bay Area counties, all of which have recently re-established mask mandates. He  said the curves are the same in all the Bay Area counties.

However, the curves are not the same. On every measure of the covid-19 pandemic, case rates, hospitalization rates, and mortality rates, Solano County is far higher than our peer Bay Area counties. Not only that, the rate of increase for Solano is significantly higher than for the rest of the Bay Area.

When Mayor Steve Young pointed these facts out to Matyas, the health director pivoted and said that  Solano County is not like the rest of the Bay Area, that we are in between the Bay Area and the Central Valley. Yet if one looks at the pandemic numbers in the Central Valley counties, there are quite a few doing better than we are.

There are also studies from various parts of the country showing the effectiveness of masks. A very informative one from Kansas was published in June 2021 in JAMA Network Open. It compared 15 counties which imposed mask mandates to 68 counties that did not. After ten months, the counties with mandates were doing far better on every measure. There are also excellent studies looking at school districts where teachers were mandated to wear masks, and the spread of the virus in those districts was much less than in districts without such mandates.

At the Benicia City Council meeting, Matyas said that in Solano County, “Our data clearly shows that indoor public spaces are not where the disease spreads.” He said spread results from private gatherings, so a mask mandate would not help. When I heard him say this, what came to mind is, “Where’s the beef?” He did not present any evidence publicly to support his statement.

There is no doubt that private gatherings are a big problem. But the odds are high that the virus behaves similarly in our county as elsewhere. There is no infectious disease expert in the country who says that indoor public gatherings are insignificant and can be ignored as a source of viral spread.

Solano County is a great place to live, but that does not mean covid-19 spreads differently here than in the rest of the U.S. During my 30 years practicing internal medicine in Solano County, I was never advised to treat infectious diseases here differently than the way doctors treat them in Kansas, Florida, or New York.

Matyas said he is relying on science to decide against mask mandates. Yet science confirms that mask mandates work. Of course other factors help as well, especially vaccinations. Sadly, our county has the lowest vaccination rate in the Bay Area. And lower than some Central Valley counties.

Matyas says mask mandates can backfire, because people will wonder why they got vaccinated if masks are still needed. He suggests that people in the northern parts of our county are not disposed towards masking. These are valid concerns. And there are two ways our county’s top health officer can address them.

He can say, “I understand why you feel that way, so I won’t rock your boats.”

Or he can say, “I understand why you feel that way, but I want you to understand some things. Vaccinated people are very protected against serious illness, but can still spread the virus. That’s why you still need to wear a mask. And there is very good evidence that wearing masks in indoor public settings will protect our community’s health and help our economy.”

Bela Matyas has chosen the first option. He appears to feel we are somehow incapable of performing as well as our peers in the rest of the Bay Area.

In times of crisis, leaders need to step up and lead. Every other Bay Area county public health director has followed the second option, and the data shows clearly we are falling behind. Thankfully, the city leadership of both Benicia and Vallejo decided we should rise to this challenge, follow the science, and try to protect our communities. They are not willing to say we have to settle for less than our neighbors in Contra Costa, or Napa, or Marin.

But we still have a lot to do to improve our vaccination rate.

See also:

BREAKING: CDC recommends indoor masking for all in Bay Area

CDC recommends entire Bay Area issue indoor mask mandate

SFGate, by Eric Ting, July 27, 2021
The CDC’s map of California counties by COVID-19 transmission rates. Masks are recommended in red and orange counties. (Center for Disease Control and Prevention) – Click here (or on the image) to go to interactive CDC map.

The Centers for Disease Control and Prevention (CDC) revised its masking guidance Tuesday to advise that all individuals — including vaccinated ones — wear masks indoors in areas with “high” and “substantial” COVID-19 transmission.

According to the CDC’s map, four Bay Area counties — San Francisco, Alameda, Contra Costa and Solano — are classified as areas of “high” transmission and the other five — Santa Clara, San Mateo, Marin, Sonoma, Napa — are classified as areas of “substantial” transmission. Masking is currently recommended but not required in every Bay Area county except Solano.

Given how Bay Area counties have previously handled the pandemic, it seems highly likely the region will turn their recommendations into mandates following the updated CDC guidance. A mask mandate is currently in effect in Los Angeles County.

Across California, most counties fall into the “high” or “substantial” categories.

California Gov. Gavin Newsom said Tuesday the state would issue updated statewide guidance sometime after the CDC guidance was released.

The CDC said the change in guidance is based on new evidence showing that while fully vaccinated individuals are protected against severe disease from the delta variant, they can transmit it to unvaccinated individuals more easily than other strains of the virus.

CDC Director Dr. Rochelle Walensky said that when earlier strains of the virus were dominant, infected vaccinated people were found to have low levels of virus in their nose and throats and were deemed unlikely to spread the virus. That has changed with the delta variant, where Walensky said the level of virus in infected vaccinated people is “indistinguishable” from the level of virus in infected unvaccinated people.

The Associated Press contributed to this report.