One Oakland neighborhood has seen a surge in positivity rates among Latino and Indigenous populations. Why?

A coronavirus testing blitz in Oakland’s Fruitvale district revealed high antibody positivity rates among the neighborhood’s Latino and Indigenous residents, indicating many were likely infected with the coronavirus in the past.

Participants of the study showed an overall antibody positivity rate of 10%. But Latinos had a positivity rate of 12%, compared with 27% among Mayan residents, UCSF said Friday.

UCSF spearheaded the initiative with a coalition of Oakland community organizations. They aimed to track the illness — and its socioeconomic impact — in this predominantly low-income, Latino neighborhood that has struggled with a disproportionately high number of infections since the start of the pandemic.

Of the 1,099 people who received nose swabs in Fruitvale on Sept. 26 and 27, including 144 children, 39 tested positive for the coronavirus — an overall positivity rate of 3.5%, researchers said.

About 97% of the people who tested positive were Latino, though they made up just 62% of those tested, UCSF said.

Meanwhile, 78 adults and six children tested positive for the COVID-19 antibody, signaling