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Ever since Santa Clara County reported the first patient with the coronavirus in the Bay Area earlier this year, the disease has spread throughout all nine counties in the region, with the number of confirmed cases escalating at a rapid pace. Since officials issued a shelter-at-home order, cases in the Bay Area jumped from 798 on March 17 to 376,935 on Feb. 2, with Santa Clara County accounting for more than a quarter of the total people infected across the region and a little over 30% of the region’s 4,265 deaths. San Mateo County has reported the fourth-highest number of cases in the region after Santa Clara, Alameda and Contra Costa counties. County health leaders have said the number of confirmed cases is expected to rise as more testing becomes available. Palo Alto Online, the Mountain View Voice and the Almanac have put together this series of charts to help you understand the proliferation of COVID-19 infections on the Peninsula. The charts, which can only be viewed from a Google Chrome browser, will be updated weekly on Tuesdays. Editor’s note: Data on cases, deaths and testing are incomplete due to a problem with the state’s reporting system for communicable diseases.
A pandemic on the rise
Last updated Feb. 1: Santa Clara County has reported 474 patients are hospitalized with COVID-19. Over the past week, the number of reported COVID-19 patients hospitalized in ICU has decreased by four, from 131 on Jan. 25 to 127 on Feb. 1. The number of COVID-19 patients listed in the chart above includes confirmed cases and those suspected to have the disease. Ventilator use does not distinguish between COVID-19 patients and other patients. Charts by Kevin Legnon.
Last updated Feb. 1: San Mateo County has reported 121 people are hospitalized with the coronavirus, all of which were confirmed cases. Over the past week, the number of reported COVID-19 patients hospitalized in ICU has decreased by four, 36 on Jan. 25 to 32 on Feb. 1. The number of COVID-19 patients listed in the chart above includes confirmed cases and those suspected to have the disease. Surge beds and ventilator use does not distinguish between COVID-19 patients and other patients.
Santa Clara County bases its testing data on the number of tests conducted rather than the individuals tested. Now, individuals who are tested multiple times are counted per test rather than only once.
Santa Clara County recorded the first known COVID-19 case in the Bay Area in 2020. It quickly became one of the earliest areas to be hard hit by the pandemic. On Feb. 1, the county reported a total of 102,427 cases and 1,418 deaths. Its total is the 6th highest in the state behind Los Angeles, Riverside, San Bernardino, San Diego and Orange counties. Note: Case totals reported after April 17 are based on specimen collection date rather than the date the positive result was reported to the state’s database.
San Mateo County recorded its first COVID-19 case on March 2. Eighteen days later, the number of confirmed cases reached double digits, marking a fast-moving upward trajectory. On Feb. 1, the county reported 36,052 cases and 395 deaths. Note: Daily totals subject to change as county receives more information on cases. On Nov. 22, the county began reporting cases by episode date.
San Jose has the most COVID-19 cases across Santa Clara and San Mateo counties, according to its data on case totals by city on Feb. 1. Some unincorporated communities of San Mateo County, which last updated its case totals by city on Jan. 28, are not labeled on this map. They include Broadmoor (180 cases), Emerald Hills (118 cases), Ladera (30 cases), North Fair Oaks (1,562 cases) and West Menlo Park (52 cases). Map by Kate Bradshaw.
Two counties, one crisis
On Feb. 1, Santa Clara County’s total of COVID-19 cases reached to 102,427 which represents 5.3% of the county’s 1.9 million residents.
On Feb. 1, San Mateo County’s total of COVID-19 cases reached 36,052 cases, which represents 4.7% of the county’s 769,545 residents.
San Mateo County’s death toll stands at 395. Santa Clara County reported a total of 1,418 deaths as of Feb. 1. The death rate in San Mateo County represents 0.05% of the total population and in Santa Clara County represents 0.07% of the total population.
Santa Clara County’s death toll climbed past the 1,000-mark on Jan. 13. On Feb. 1, its total of recorded fatalities stood at 1,418. San Mateo County’s death toll recently surpassed the 300-mark on Jan. 18. The death toll there is currently 395.
Who is at risk?
SANTA CLARA COUNTY
According to data from the county Public Health Department, men and women have been equally vulnerable to infection.
Men accounted for 49% of the 102,427 confirmed cases and 53% of the 1,418 deaths reported in Santa Clara County on Feb. 1.
Women accounted for 51% of the cases and 47% of all deaths reported on Feb. 1.
Breakdown based on 102,427 cases as reported by the county Public Health Department on Feb. 1 shows a near-even split between women and men.
Breakdown based on 1,418 deaths as reported by the county Public Health Department on Feb. 1 show more men than women have died from COVID-19.
SAN MATEO COUNTY
As of Feb. 1, women accounted for 50% of the county’s 36,052 confirmed cases and 49% of the county’s 395 deaths while men accounted for 49% of all cases and 51% of all deaths.
Breakdown based on 36,052 cases as reported by the county Health Department on Feb. 1 shows a near-even split of people infected with COVID-19 across gender.
Breakdown based on 395 deaths reported by the county Health Department on Feb. 1 shows more men than women have died from COVID-19.
CASES AND DEATHS BY AGE
Santa Clara and San Mateo counties are also tracking coronavirus cases and deaths by age.
In both counties, residents in every age group, from those 20 years old and younger to those 90 years and older, have been infected by the virus.
In Santa Clara and San Mateo counties, people ages 20-29 represent the largest segment of the population infected with the virus.
Breakdown based on 102,427 cases as reported by the county Public Health Department on Feb. 1 shows a large number of people age 49 and younger have the new coronavirus.
Breakdown based on 36,052 cases as reported by the county Health Department on Feb. 1 shows the most cases were found in people ages 20-29.
The rate of infection does not appear to ascend with age in Santa Clara County, according to the county’s data. Those ages 80 and older have fewer reported cases than those ages 70-79, who have fewer reported cases than those ages 60-69.
In San Mateo County, those in the 30-39 age group represent the second-largest segment of the population infected with the virus.
Those ages 80-89 account for 28%of the deaths in Santa Clara County, followed by those over 90 years old, which represent 25% of the death toll.
In San Mateo County, no one under age 29 has died from the disease, according to statistics from the county Health Department. Those ages 80 to 89 account for 32% of the county’s deaths.
Breakdown based on 1,418 deaths as reported by the county Public Health Department on Feb. 1 shows a majority of the people who have died were between 80 and 89 years old.
Breakdown based on 395 deaths as reported by the county Health Department on Feb. 1 shows most people who have died of COVID-19 were 80 to 89 years old.
Find comprehensive coverage on the Midpeninsula’s response to the new coronavirus by Palo Alto Online, the Mountain View Voice and the Almanac here.
TALK ABOUT IT
Discuss the local data on coronavirus cases and deaths on Town Square, our online discussion forum, which can be found here.
