SCC county: more data

[M_T]

Santa Clara County (CA) is what I've watched the most since I live there, and a number of participants of this board live nearby.  I used to track their data very carefully, but that was replaced by watching the vaccines.

I visited the county's COVID dashboard and found some interesting new data available.

First, the good news (uh-oh).  SCC is doing very well in regards to  COVID infections relative to the state and the country.
The 7-day rolling average of daily new cases is 105, about where it was late June (and the valley in October between the July and January peaks).  That translate to a 7-day case rate per 100K of 15 as of 2 weeks ago. Compare that to California's 35 and the US's (roughly) 120.

The bad news is that levels of SARS-COV-2 gene in the sewage at the Palo Alto sewage plant bottomed out 2 weeks ago (Mar. 18) and has started to rise, approximately doubling in that time.  That covers most of the northwest part of the county.  Elsewhere in the county the numbers are still slowly dropping.    (My guess is that one or more of the variants has been introduced in the affluent NW part of the county and is spreading, or the disease is spreading in an age-group where it is mostly asymptomatic.)

Most of the other data ends about March 18, so it doesn't clarify the situation.  Among the new data is an interesting set of graphs on a page named Race/Ethnicity Trend Report.  It has graphs for the weekly infections/100K for age groups (including pediatric ages), race/ethnicity, Asian subgroups, and city of residence.  For each category, there are two graphs - one since Feb 2020 and one for the past 4 weeks (ending 2 weeks ago).

The Contact Tracing data has been updated since I last looked.  Through the month of February, about 25% of cases had contacts elicited, with an average of about 2.2 contacts/case.  (I presume that means that those 25% of the cases had about 8.8 contacts on average.)

The Vaccination Dashboard shows the percentage of population vaccinated within groups by age, gender, race//ethnicity. (72% of 75+, 69% of 65-74, ..., 18.7% of 16-29)

[82Card]

I've been recording the daily case numbers for Bay Area counties from Worldometers to a spreadsheet that computes running 7 day averages per 100k. These number do not match the official state numbers for tier assignment, generally they run higher than the state numbers. However, I find it useful for spotting trends. The numbers have been rising slightly in most of the the Bay Area in the last week.

Santa Clara county has been fairly flat for the last 8 days. It's seven day average was at 5.6 per 100k on March 25 and also at 5.6 today. in the mean time it has wander a tenth or two above or below. I have no idea what parts of the county the numbers are from. This could be consistent with a rise in NW part of the county and a drop elsewhere.

In the East Bay. Alameda and Contra Costa are both rising. Alameda bottomed out at 4.2/100k on March 26 and has since risen to 5.2 today. CoCo bottomed out 6.2 on March 27 and is at 7.1 today.

On the Peninsula, San Mateo bottomed out at 4.2 on March 24 and is at 6.4 today. SF has been fairly flat in the last week, recording 7 day average of 4.0 today. It had been down to 2.9 on March 20.

[M_T]

After about a 10-day bump, it looks like the amount of SARS-CoV-2 detected at the Palo Alto sewage treatment plant has dropped back down to where it was.