SAN DIEGO -- Later this week, a COVID-19 testing site will open up just outside a pedestrian crossing in San Ysidro, where tens of thousands of people enter the United States from Mexico every day.
The PedEast testing location is thought to be the closest to the U.S.-Mexico border in any state, and is the result, San Diego County says, of a data-driven, community-led strategy that aims to slow the spread of COVID-19 in South Bay communities.
Officials have long known that the pandemic has disproportionately affected the South County region, where cases continue to climb. Factors that contribute to these increases include long-standing disparities in access to health care, a large population of essential workers and a lack of affordable housing.
Proximity to the border also plays a role, county officials said.
As in San Diego County, COVID-19 cases are increasing south of the border. Tijuana, a city of about 1.8 million, has logged nearly 4,200 COVID-19 cases. The state of Baja California, which has an estimated population of about 3.3 million, has reported around 14,200 cases and more than 2,760 deaths.
San Diego County has a higher case rate, with nearly 32,000 cases among about 3.3 million residents, but also tests at a much higher rate than its sister state to the south.
The two regions are inextricably linked by daily travel that flows across the border, in both directions, every day.
"We are two nations. We're two cities. But this is really a binational culture we have," said Supervisor Greg Cox, whose district includes the South County region.
Despite U.S. restrictions on nonessential travel, between 18,000 and 22,000 people cross the border at PedEast every day, federal officials said. Many of these individuals -- including American citizens who live in Tijuana and Mexican citizens with work visas -- are essential workers in health care, at public agencies and in restaurants.
It can be difficult for these employees to find time to get tested, county officials said, even though many are at greater risk of contracting COVID-19. Although Customs and Border Protection officials watch for symptoms of the virus, referring travelers who appear sick to health authorities, the federal agency doesn't perform testing of its own.